Context : The Angels of the Ages (1968) Unicorn (1969) A Beard of Stars (1970) as T. Rex T. Rex (1970) The Best of T.Rex (1971) Electric Warrior (1971) Electric Warrior Home Demos (1971) The Slider Home Demos (1971) Live at the BBC (1971) Bolan Boogie (1972) The Slider (1972) Great Hits (1972) Tanx Home Demos (1973) Tanx (1973) Zinc Alloy and the Hidden Riders of Tomorrow (1974) Light of Love (1974) Bolan's Zip Gun (1975) Futuristic Dragon (1976) Get It On (1976) Dandy in the Underworld (1977) Bolan's Best + 1 (1977) T.Rex With Marc Bolan (1978) Solid Gold T.Rex (1979) The Unobtainable T.Rex (1980) T.rex in Concert (1981) You Scare Me To Death (1981) Megarex 2 (1985) Megarex 3 (1985) A Wizard, A True Star (1996) The Very Best of T.Rex (1998) The Very Best of T.Rex, Vol. 2 (1999) 
Subject : Marc Bolan 
Relation : date of death
Which is the date of death for Marc Bolan?