Given the question: What key details about martin knakal can be extracted from the following bio? Bio: martin knakal -lrb- born 17 april 1984 -rrb- is a czech football defender , currently playing for fk banik sokolov . he made over 50 appearances in the gambrinus liga . he played international football at youth level for his country including eight matches and one goal for czech republic u21 .
The answer is:
- clubs is fc 1905 -lrb- loan -rrb- 1 . fk pribram fk banik viktoria most tj jiskra domazlice -lrb- loan -rrb- fk banik plzen sokolov xanthi sk sigma olomouc bohemians- caps is 41 7 6 3 5- position is defender- nationalcaps is 8- currentclub is fk banik sokolov- height is 1.87 0- years is 2004 2009 -- 2012 2012 2012 -- -- 2007 2007 2007 2008 2008 -- 2009- nationalyears is 2005 -- 2007- clubnumber is 4- nationalgoals is 1- pcupdate is 2012-12-31- birth date is 17 april 1984- name is martin knakal- nationalteam is czech republic u21- birth place is czechoslovakia- goals is 1 0 0 0 0