woman riding a bicycle cart.
A guy is on a mountain bike.
There is either a woman or a guy. The person can't be riding a bicycle cart and a mountain bike at the same time.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_cart(x3) & of(x3,x4) & n_bicycle(x4) & (x1 = x2) & n_woman(x1))
exists p1 x1.(exists x2 x3.(on(x1,x2) & n_bike(x2) & of(x2,x3) & n_mountain(x3)) & n_guy(x1))