Question: what is it called when two letters are joined together
[{'answer': 'ligature', 'provenance': [{'wikipedia_id': '400582', 'title': 'Typographic ligature', 'start_paragraph_id': 0, 'start_character': 12, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '400582', 'title': 'Typographic ligature', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 368, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13977950780433944570}, 'section': 'Section::::Abstract.'}]}]