Sentence: Thirty-five percent ( 6 of 17 ) of the patients receiving docetaxel alone and 53 % ( 19 of 36 ) of those receiving docetaxel and thalidomide have had a PSA decrease of at least 50 % .
Drug combination annotation:
[{'class': 'POS', 'spans': ['docetaxel', 'thalidomide'], 'is_context_needed': True}]