Question:
Which employer did Simon Streatfeild work for in Aug, 1983?

Context:
 Simon Streatfeild works for Academy of St Martin in the Fields from Jan, 1958 to Jan, 1965. 
 Simon Streatfeild works for London Symphony Orchestra from Jan, 1953 to Jan, 1955. 
 Simon Streatfeild works for Regina Symphony Orchestra from Jan, 1981 to Jan, 1984.

Answer:
Regina Symphony Orchestra