Question: who played mark on the show the rifleman
[{'answer': 'John Ernest Crawford', 'provenance': [{'wikipedia_id': '1888578', 'title': 'Johnny Crawford', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1888578', 'title': 'Johnny Crawford', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 348, 'bleu_score': 0.8232658949909031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2622498553825258693}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1888578', 'title': 'Johnny Crawford', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['John Ernest Crawford (born March 26, 1946) is an American actor, singer, and musician. At age 12, Crawford rose to prominence playing Mark McCain, the son of Lucas McCain (played by Chuck Connors), in the popular ABC Western series, "The Rifleman," which aired from 1958 to 1963.', 'John Ernest Crawford (born March 26, 1946) is an American actor, singer, and musician. At age 12, Crawford rose to prominence playing Mark McCain, the son of Lucas McCain (played by Chuck Connors), in the popular ABC Western series, "The Rifleman," which aired from 1958 to 1963.', 'Crawford rose to prominence playing Mark McCain, the son of Lucas McCain (played by Chuck Connors), in the popular ABC Western series, "The Rifleman']}}]}]