Question:
Who was the chair of Independent Television Authority in Sep, 1957?

Context:
 Charles Hill, Baron Hill of Luton is the chair of Independent Television Authority from Jul, 1963 to Aug, 1967. 
 Herbert Bowden, Baron Aylestone is the chair of Independent Television Authority from Sep, 1967 to Jul, 1972. 
 Ronald Wilfred Matthews is the chair of Independent Television Authority from Sep, 1957 to Nov, 1957.

Answer:
Question:
Who was the chair of Independent Television Authority in Sep, 1957?

Context:
 Charles Hill, Baron Hill of Luton is the chair of Independent Television Authority from Jul, 1963 to Aug, 1967. 
 Herbert Bowden, Baron Aylestone is the chair of Independent Television Authority from Sep, 1967 to Jul, 1972. 
 Ronald Wilfred Matthews is the chair of Independent Television Authority from Sep, 1957 to Nov, 1957.

Answer:
user
Ronald Wilfred Matthews
assistant
Question:
Who was the chair of Independent Television Authority in Sep, 1957?

Context:
 Charles Hill, Baron Hill of Luton is the chair of Independent Television Authority from Jul, 1963 to Aug, 1967. 
 Herbert Bowden, Baron Aylestone is the chair of Independent Television Authority from Sep, 1967 to Jul, 1972. 
 Ronald Wilfred Matthews is the chair of Independent Television Authority from Sep, 1957 to Nov, 1957.

Answer:
user
Herbert Bowden, Baron Aylestone
Charles Hill, Baron Hill of Luton
assistant
Question:
Who was the chair of Independent Television Authority in Sep, 1957?

Context:
 Charles Hill, Baron Hill of Luton is the chair of Independent Television Authority from Jul, 1963 to Aug, 1967. 
 Herbert Bowden, Baron Aylestone is the chair of Independent Television Authority from Sep, 1967 to Jul, 1972. 
 Ronald Wilfred Matthews is the chair of Independent Television Authority from Sep, 1957 to Nov, 1957.

Answer:
user
Ronald Wilfred Matthews
assistant