Question: who sings the song you left me just when i needed you most
[{'answer': 'Randy VanWarmer', 'provenance': [{'wikipedia_id': '16923726', 'title': 'Just When I Needed You Most', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '16923726', 'title': 'Just When I Needed You Most', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 113, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16144058109695058895}, 'section': 'Section::::Abstract.'}]}]