A person is kayaking on a river and is steering himself in between two large rocks.
A person drives a steamboat.
The person cannot be kayaking and driving a steam boat simultaneously.
exists e2 e1 s1 x1 x2 x3 x4.(in(e2,x4) & n_rock(x4) & a_large(s1) & Theme(s1,x4) & card_eq_2(x4) & r_between(x4) & Theme(e2,x1) & Actor(e2,x3) & v_steer(e2) & n_male(x1) & n_person(x3) & on(e1,x2) & n_river(x2) & Actor(e1,x1) & v_kayake(e1) & n_person(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_steamboat(x2) & n_person(x1))