Question: where is the atomic mass located on an element
[{'answer': 'after the element name', 'provenance': [{'wikipedia_id': '659068', 'title': 'Mass number', 'start_paragraph_id': 2, 'start_character': 34, 'end_paragraph_id': 2, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "superscript to the left of an element 's symbol"}, {'provenance': [{'wikipedia_id': '659068', 'title': 'Mass number', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 464, 'bleu_score': 0.8776104761026491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3409755699735636580}, 'section': 'Section::::Abstract.'}]}]