Question:
Which team did Piotr Ćwielong play for in Jul, 2007?

Context:
 Piotr Ćwielong plays for Poland national association football team from Jan, 2013 to Jan, 2013. 
 Piotr Ćwielong plays for VfL Bochum II from Jan, 2014 to Jan, 2014. 
 Piotr Ćwielong plays for Poland Olympic football team from Jan, 2009 to Jan, 2010. 
 Piotr Ćwielong plays for Poland national under-18 football team from Jan, 2004 to Jan, 2004. 
 Piotr Ćwielong plays for Wisła Kraków from Jan, 2007 to Jan, 2010. 
 Piotr Ćwielong plays for Ruch Chorzów from Jan, 2008 to Jan, 2008. 
 Piotr Ćwielong plays for Poland national under-21 football team from Jan, 2007 to Jan, 2008. 
 Piotr Ćwielong plays for VfL Bochum from Jan, 2013 to Dec, 2022. 
 Piotr Ćwielong plays for Śląsk Wrocław from Jan, 2010 to Jan, 2013. 
 Piotr Ćwielong plays for Poland national under-19 football team from Jan, 2004 to Jan, 2004.

Answer:
Poland national under-21 football team