People brace themselves on a carnival ride.
People are bracing themselves on a carnival ride.
Brace themselves can be rephrased as 'are bracing themselves'
exists e1 s1 x1 x2 x3.(n_group(x2) & on(e1,x3) & n_ride(x3) & a_carnival(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_brace(e1) & n_people(x1))
exists e1 s1 x1 x2 x3.(n_group(x2) & on(e1,x3) & n_ride(x3) & a_carnival(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_brace(e1) & n_people(x1))