A man on a horse throws a lasso at a calf.
A man in a rodeo on a horse with a lasso.
You can not infer he had a lasso.
exists e1 x1 x2 x3 x4.(at(e1,x4) & n_calf(x4) & Theme(e1,x3) & Actor(e1,x1) & v_throw(e1) & n_lasso(x3) & on(x1,x2) & n_horse(x2) & n_man(x1))
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & on(x2,x3) & with(x3,x4) & n_lasso(x4) & n_horse(x3) & n_rodeo(x2) & n_man(x1))