Question:
Which team did Steve Butler play for in Apr, 1991?

Context:
 Steve Butler plays for Cambridge United F.C. from Jan, 1992 to Jan, 1995. 
 Steve Butler plays for Maidstone United F.C. from Jan, 1986 to Jan, 1991. 
 Steve Butler plays for Brentford F.C. from Jan, 1984 to Jan, 1986. 
 Steve Butler plays for Stevenage F.C. from Jan, 1999 to Jan, 1999. 
 Steve Butler plays for Watford F.C. from Jan, 1991 to Jan, 1992. 
 Steve Butler plays for Gillingham F.C. from Jan, 1999 to Jan, 2000. 
 Steve Butler plays for AFC Bournemouth from Jan, 1992 to Jan, 1992. 
 Steve Butler plays for Windsor & Eton F.C. from Jan, 1983 to Jan, 1984. 
 Steve Butler plays for Peterborough United F.C. from Jan, 1998 to Jan, 1999.

Answer:
Watford F.C.