Question: how many episodes are there in when calls the heart season 3
[{'answer': '8', 'provenance': [{'wikipedia_id': '46576394', 'title': 'List of When Calls the Heart episodes', 'start_paragraph_id': 2, 'start_character': 131, 'end_paragraph_id': 2, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]