CHICAGO --An Illinois citizens group is suing the Chicago Park District and Latin School over land being turned into a soccer field. Our Parks Incorporated filed the claim over the land in Lincoln Park's south field. The group is trying to overturn a park district agreement that grants Latin up to 20 years of priority use of the public park land. The group is also asking for an injunction to stop the soccer field's construction. Members argue this land is for the public to use. "It's a regional park and it's for all of Chicago, and this is the last open space. And this soccer field with artificial turf is an insult to the park and insult to the citizens," said Greta Lear, Protect Our Parks Inc. A spokesperson for Latin School says the playing surface will serve the entire community, including nearby schools, sports organizations and clubs.