Question:
Which team did David Casasnovas play for in May, 2004?

Context:
 David Casasnovas plays for FC Biel-Bienne from Jan, 2008 to Jan, 2010. 
 David Casasnovas plays for FC Solothurn from Jan, 1999 to Jan, 2001. 
 David Casasnovas plays for FC La Chaux-de-Fonds from Jan, 2004 to Jan, 2006. 
 David Casasnovas plays for SR Delémont from Jan, 2001 to Jan, 2004.

Answer:
FC La Chaux-de-Fonds