question: Who is the paternal grandfather of Richard Beauchamp, 1St Earl Of Worcester?
context: [["Gilbert Talbot, 3rd Baron Talbot", ["Gilbert Talbot, 3rd Baron Talbot( c. 1332\u20131387) was an English nobleman and soldier.", "He was the grandfather of John Talbot, 1st Earl of Shrewsbury."]], ["John Beauchamp, 1st Baron Beauchamp of Kidderminster", ["Sir John de Beauchamp, 1st Baron Beauchamp of Kidderminster( 1339- 1388) of Holt Castle in Worcestershire was an administrator and landowner."]], ["Henry Somerset, 2nd Earl of Worcester", ["Henry Somerset, 2nd Earl of Worcester( 26 November 1549) was an English nobleman.", "He was the son of Charles Somerset, 1st Earl of Worcester and Elizabeth Herbert, 3rd Baroness Herbert.", "On his father's death on 15 April 1526, he succeeded as the second Earl of Worcester.", "From his mother, he inherited the title of Baron Herbert.", "Somerset obtained Tintern Abbey after the Dissolution of the Monasteries.", "He married twice:"]], ["Richard Beauchamp, 1st Earl of Worcester", ["Richard de Beauchamp, 1st Earl of Worcester, KCB (c. 1394 \u2013 c. 18 March 1421/1422) was an English peer.", "The only son of William de Beauchamp, 1st Baron Bergavenny, he succeeded as 2nd Baron Bergavenny at the death of his father on 8 May 1411.", "On 27 July 1411, he married Lady Isabel le Despenser, daughter of Thomas le Despenser, 1st Earl of Gloucester, and great-granddaughter of Edward III.", "They had one child, Lady Elizabeth de Beauchamp, later 3rd Baroness Bergavenny, who married Sir Edward Neville, later 1st Baron Bergavenny.", "He was joint Warden of the Welsh Marches in 1415, and a captain of lances and archers in Normandy in 1418.", "In February 1420/1, he was created Earl of Worcester.", "Worcester was mortally wounded on 18 March 1421/2 at the Siege of Meaux and died soon after.", "His body was taken back to England and he was buried on 25 April 1422 at Tewkesbury, Gloucestershire.", "His daughter inherited his estates and his barony of Bergavenny, although the castle and honour of Abergavenny were still held by her grandmother in dower."]], ["Joan FitzAlan, Baroness Bergavenny", ["Joan de Beauchamp, Baroness Bergavenny( n\u00e9e FitzAlan; 1375 \u2013 14 November 1435) was an English noblewoman, and the wife of William de Beauchamp, 1st Baron Bergavenny of the Welsh Marches."]], ["Philippa de Beauchamp", ["Philippa de Beauchamp( before 1344- 6 April 1386) was the daughter of Thomas de Beauchamp, 11th Earl of Warwick and Katherine Mortimer.", "On or before 1 March 1350 she married Hugh de Stafford, 2nd Earl of Stafford, son of Ralph de Stafford, 1st Earl of Stafford and Margaret Audley, Baroness Audley.", "Philippa and Hugh had seven children."]], ["Richard (III), bishop of Bayeux", ["Richard of Gloucester was a bishop of Bayeux in France.", "Also called Richard Fitz Robert, he was the bastard son of Robert, 1st Earl of Gloucester, and Isabel of Dover, daughter of Samson of Worcester, Bishop of Worcester.", "He was the nephew of Richard de Douvres, his predecessor at the bishopric of Bayeux."]], ["Eleanor Beauchamp, Duchess of Somerset", ["Lady Eleanor Beauchamp, Baroness de Ros and Duchess of Somerset( September 1408 \u2013 6 March 1467) at Wedgenock, Warwickshire, England, was the second daughter of Richard de Beauchamp, 13th Earl of Warwick and Elizabeth de Berkeley, daughter of Thomas de Berkeley, 5th Baron Berkeley."]], ["William Beauchamp, 1st Baron Bergavenny", ["William de Beauchamp, 1st Baron Bergavenny, KG", "(c. 1343 \u2013 8 May 1411) was an English peer.", "Beauchamp was the fourth son of Thomas de Beauchamp, 11th Earl of Warwick, and Katherine Mortimer.", "He served under Sir John Chandos during the Hundred Years' War, and was created a Knight of the Garter in 1376.", "He served as Captain of Calais in 1383.", "Upon the death of his first cousin once removed, John Hastings, 3rd Earl of Pembroke on 30 December 1389, William inherited the lordship of Abergavenny, including Abergavenny Castle.", "He was summoned to Parliament on 23 July 1392 as \"Willilmo Beauchamp de Bergavenny\", by which he is held to have become Baron Bergavenny, a barony by writ.", "In 1399, he was appointed Justiciar of South Wales and Governor of Pembroke.", "He entailed the castle and Honour of Abergavenny on the issue male of his body, with remainder to his brother Thomas de Beauchamp, 12th Earl of Warwick and his heirs male; his wife enjoyed it in dower until her death in 1435.", "Bergavenny died in 1411 and was buried at Black Friars, Hereford."]], ["John Beauchamp, 1st Baron Beauchamp of Warwick", ["Admiral of the Fleet Sir John Paveley de Beauchamp, 1st Baron Beauchamp de Warwick KG( c. 1316 \u2013 2 December 1360) was the third son of Guy de Beauchamp, 10th Earl of Warwick, and brother of Thomas de Beauchamp, 11th Earl of Warwick, with whom he became a founder and the tenth Knight of the Order of the Garter in 1348."]]]
supporting_facts: [["Richard Beauchamp, 1st Earl of Worcester", 1], ["William Beauchamp, 1st Baron Bergavenny", 2]]
evidences: [["Richard de Beauchamp, 1st Earl of Worcester", "father", "William de Beauchamp, 1st Baron Bergavenny"], ["William de Beauchamp, 1st Baron Bergavenny", "father", "Thomas de Beauchamp"]]
answer: Thomas de Beauchamp