Group of runners participate in a marathon.
People are sitting in a library.
The people can't be runners if they're sitting.
exists e1 x1 x2 x3.(ne_org_group(x1) & in(e1,x3) & n_marathon(x3) & Actor(e1,x1) & v_participate(e1) & of(x1,x2) & n_runner(x2))
exists e1 x1 x2.(in(e1,x2) & n_library(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))