Question: moss growing on trees is an example of what
[{'answer': 'epiphytes', 'provenance': [{'wikipedia_id': '177938', 'title': 'Moss', 'start_paragraph_id': 37, 'start_character': 544, 'end_paragraph_id': 37, 'end_character': 553, 'bleu_score': 1.0, 'section': 'Section::::Ecology.:Habitat.\n'}]}, {'provenance': [{'wikipedia_id': '177938', 'title': 'Moss', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 591, 'bleu_score': 0.9796927878356411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9093178768795366605}, 'section': 'Section::::Ecology.:Habitat.\n'}]}]