Question:
Which position did Michael Shersby hold in Oct, 1973?

Context:
 Michael Shersby holds the position of Member of the 48th Parliament of the United Kingdom from May, 1979 to May, 1983. 
 Michael Shersby holds the position of Member of the 47th Parliament of the United Kingdom from Oct, 1974 to Apr, 1979. 
 Michael Shersby holds the position of Member of the 46th Parliament of the United Kingdom from Feb, 1974 to Sep, 1974. 
 Michael Shersby holds the position of Member of the 45th Parliament of the United Kingdom from Dec, 1972 to Feb, 1974. 
 Michael Shersby holds the position of Member of the 51st Parliament of the United Kingdom from Apr, 1992 to Apr, 1997. 
 Michael Shersby holds the position of Member of the 49th Parliament of the United Kingdom from Jun, 1983 to May, 1987. 
 Michael Shersby holds the position of Member of the 52nd Parliament of the United Kingdom from May, 1997 to May, 1997. 
 Michael Shersby holds the position of Member of the 50th Parliament of the United Kingdom from Jun, 1987 to Mar, 1992.

Answer:
Member of the 45th Parliament of the United Kingdom