Question: what are the proteins called that transport electrons in the thylakoid membrane
[{'answer': 'plastoquinone', 'provenance': [{'wikipedia_id': '209455', 'title': 'Thylakoid', 'start_paragraph_id': 25, 'start_character': 432, 'end_paragraph_id': 25, 'end_character': 445, 'bleu_score': 1.0, 'section': 'Section::::Proteins.:Integral membrane proteins.\n'}]}, {'answer': 'plastocyanin', 'provenance': [{'wikipedia_id': '209455', 'title': 'Thylakoid', 'start_paragraph_id': 25, 'start_character': 450, 'end_paragraph_id': 25, 'end_character': 462, 'bleu_score': 1.0, 'section': 'Section::::Proteins.:Integral membrane proteins.\n'}]}, {'provenance': [{'wikipedia_id': '209455', 'title': 'Thylakoid', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 635, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5992064581752549155}, 'section': 'Section::::Proteins.:Integral membrane proteins.\n'}]}]