Complex sentence: In June 2007, AZ reached a deal concerning a loan involving Lens; it meant he would play the 2007--08 season for NEC, and that he would return to AZ the season afterwards.
Split into simpler sentences: In June 2007, AZ reached a deal concerning a loan involving Lens. It meant that he would play the 2007--08 season for N.E.C., and that he would return to AZ the season afterwards.