A person does a flip by two sailboats and a lake.
A person is outdoors.
the lake implies that the person is outdoors.
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & subset_of(x5,x2) & n_lake(x5) & subset_of(x3,x2) & by(x3,x4) & n_sailboat(x4) & card_eq_2(x4) & n_flip(x3) & n_person(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_outdoors(x2)) & n_person(x1))