Question:
Which team did Yves Deroff play for in Mar, 2009?

Context:
 Yves Deroff plays for RC Strasbourg from Jan, 2002 to Jan, 2007. 
 Yves Deroff plays for France national under-19 football team from Jan, 1997 to Jan, 1997. 
 Yves Deroff plays for Angers SCO from Jan, 2010 to Jan, 2012. 
 Yves Deroff plays for En Avant de Guingamp from Jan, 2007 to Jan, 2010. 
 Yves Deroff plays for France national under-18 football team from Jan, 1997 to Jan, 1997. 
 Yves Deroff plays for F.C. Nantes from Jan, 1998 to Jan, 2002.

Answer:
En Avant de Guingamp