instruction: what was the name of the drug that was prescribed two times to patient 013-28507 since 10/2104?
response: SELECT t1.drugname FROM (SELECT medication.drugname, COUNT(medication.drugstarttime) AS c1 FROM medication WHERE medication.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '013-28507')) AND STRFTIME('%y-%m', medication.drugstarttime) >= '2104-10' GROUP BY medication.drugname) AS t1 WHERE t1.c1 = 2