Sentence: Serious adverse events were reported by 24 ( 34 % ) of 71 patients receiving olaparib and abiraterone ( seven of which were related to treatment ) and 13 ( 18 % ) of 71 patients receiving placebo and abiraterone ( one of which was related to treatment ) .
Drug combination annotation:
[{'class': 'POS', 'spans': ['olaparib', 'abiraterone'], 'is_context_needed': True}]