Question: where does germination of a pollen grain occur
[{'answer': 'on the stigma', 'provenance': [{'wikipedia_id': '227478', 'title': 'Germination', 'start_paragraph_id': 30, 'start_character': 442, 'end_paragraph_id': 30, 'end_character': 455, 'bleu_score': 1.0, 'section': 'Section::::Pollen germination.\n'}]}, {'provenance': [{'wikipedia_id': '227478', 'title': 'Germination', 'start_paragraph_id': 30, 'start_character': 0, 'end_paragraph_id': 30, 'end_character': 757, 'bleu_score': 0.9845548242372031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16575979587104954450}, 'section': 'Section::::Pollen germination.\n'}]}]