People hang upside down as a roller coaster executes a spiral loop-the-loop.
There are people riding a roller coaster.
People riding a roller coaster hang upside down.
exists e1 p1 p2 x1.(exists e2 s2 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x2) & v_execute(e2) & n_loop-the-loop(x4) & a_spiral(s2) & Theme(s2,x4) & n_coaster(x2) & of(x2,x3) & n_roller(x3)) & as(e1,p2) & exists s1.(r_upside(s1) & Theme(s1,x1) & a_down(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_hang(e1) & n_people(x1))
exists p1 x1 e1 x2 x3 x4 x5.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_coaster(x4) & of(x4,x5) & n_roller(x5) & (x2 = x3) & n_people(x2))