. >> to understand how we got to this dilemma and who put up the fence, we spoke to elizabeth creeley. she's part of the mission greenway to have a mission for the space. >> we would like to see a greenway in common with jury comments. we would like for it to include some aspects of urban agriculture. >> the fence was put up in the 80's. one of the property owners in the area has a key to the lock. she said her group tried for about 10 years to speak to the people involved. this weekend, they got fed up and broke the lock to begin -- >> what we saw was people walking ontas the's om to share. >> what happened this weekend you said that is it? >> after 10 years of trying. >> who owns it? according to the san francisco real estate department, the last owner was a southern pacific railroad, but it went out of business in 1996. so what now? >> all kinds of different things that have happened over the years, people trying to take claims on the land, lawsuits and fake deeds. >> he works for supervisor hillary ronen. the parcel is in her district. >> the railroad had permission to use it. the