Question: who plays cat grant's son on supergirl
[{'answer': 'Levi Miller', 'provenance': [{'wikipedia_id': '49222623', 'title': 'List of Supergirl characters', 'start_paragraph_id': 194, 'start_character': 39, 'end_paragraph_id': 194, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Guest stars.:Introduced in season one.\n'}]}, {'provenance': [{'wikipedia_id': '49222623', 'title': 'List of Supergirl characters', 'start_paragraph_id': 194, 'start_character': 0, 'end_paragraph_id': 194, 'end_character': 178, 'bleu_score': 0.8154038064489421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7469910946427392517}, 'section': 'Section::::Guest stars.:Introduced in season one.\n'}]}]