People are flipped upside-down on a bright yellow roller coaster.
People are screaming while they are suspended on the roller coaster.
One can ride a roller coaster without screaming.
exists e1 p1 s1 s2 x1 x2 x3.(on(e1,x2) & n_coaster(x2) & of(x2,x3) & n_roller(x3) & a_yellow(s2) & Theme(s2,x2) & a_bright(s1) & Theme(s1,x2) & exists s3.(Theme(s3,x1) & a_upside-down(s3)) & Recipient(e1,p1) & Topic(e1,x1) & v_flip(e1) & n_people(x1))
exists e1 p1 x1 x2 x3.(n_coaster(x2) & of(x2,x3) & n_roller(x3) & exists e2.(on(e2,x2) & Theme(e2,x1) & v_suspend(e2)) & n_thing(x1) & while(e1,p1) & Actor(e1,x1) & v_scream(e1) & n_people(x1))