A beautiful waterfall with two people walking on the road beside it.
Two people are swimming in the lake.
They can't be both swimming and walking.
exists e1 s1 x1 x2 x3 x4.(n_thing(x4) & n_road(x4) & a_topic(x1) & with(x1,x2) & beside(e1,x4) & on(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_people(x2) & card_eq_2(x2) & n_waterfall(x1) & a_beautiful(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_lake(x2) & in(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_people(x1) & card_eq_2(x1))