Question: Andor Toth was the founding concertmaster of the Los Angeles Chamber Orchestra under which English violinist that was considered "one of the world's greatest conducters"?
Sentence (from "Neville Marriner"): Sir Neville Marriner, {'1': ", '2': ", '3': ", '4': "} (15 April 1924 – 2 October 2016) was an English violinist who became "one of the world's greatest conductors".
Relevant evidence: Yes