Question: what is the name of the two dots over a vowel
[{'answer': 'umlaut', 'provenance': [{'wikipedia_id': '3821641', 'title': 'Diaeresis (diacritic)', 'start_paragraph_id': 1, 'start_character': 117, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3821641', 'title': 'Diaeresis (diacritic)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 300, 'bleu_score': 0.586064865614183, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16386774229805747805}, 'section': 'Section::::Abstract.'}]}]