A rock climber hangs from a ledge while others look on.
People are watching a rock climber hang.
rock climber refers to people. look on implies watching.
exists e1 p1 x1 x2 x3.(exists e2 p2 x4.(exists s1.(Theme(s1,x4) & a_on(s1)) & Topic(e2,p2) & Actor(e2,x4) & v_look(e2) & -(x4 = x1) & n_person(x4)) & n_person(x1) & while(e1,p1) & from(e1,x3) & n_ledge(x3) & Actor(e1,x1) & v_hang(e1) & n_climber(x1) & of(x1,x2) & n_rock(x2))
exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_hang(x2) & of(x2,x4) & n_climber(x4) & of(x2,x3) & n_rock(x3) & n_people(x1))