a group of people ride a roller coaster that is passing over some water.
the people are sleeping on a bed
The people cannot ride a roller coaster and be sleeping on a bed at the same time.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & a_over(s1) & Manner(e1,s1) & Theme(e1,x6) & Actor(e1,x5) & v_pass(e1) & n_water(x6) & (x3 = x5) & n_coaster(x3) & of(x3,x4) & n_roller(x4) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(n_people(x1) & on(e1,x2) & n_bed(x2) & Actor(e1,x1) & v_sleep(e1))