Three people wearing white hard hats ride on a forklift.
they are all working
They does not always mean three people and wearing white hard hats while riding a fork lift does not mean they are all working.
exists e2 e1 s1 s2 x1 x2 x3 x4.(on(e2,x4) & n_forklift(x4) & Actor(e2,x1) & v_ride(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & a_hard(s2) & Theme(s2,x3) & a_white(s1) & Theme(s1,x3) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists e1 s1 x1.(n_thing(x1) & a_all(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1))