The lady in the red car is crossing the bridge.
Someone is crossing.
Someone is crossing the bridge, and the lady in the red car is a someone.
exists e1 s1 x1 x2 x3.(n_bridge(x3) & n_car(x2) & a_red(s1) & Theme(s1,x2) & n_lady(x1) & Theme(e1,x3) & Actor(e1,x1) & v_cross(e1) & in(x1,x2))
exists e1 x1.(Actor(e1,x1) & v_cross(e1) & n_person(x1))