a lone skier skiing down a snowy mountain on one ski.
The person is building a snowman.
skiing and building are different activities
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & down(x1,x3) & on(x3,x4) & n_ski(x4) & card_eq_1(x4) & n_mountain(x3) & a_snowy(s2) & Theme(s2,x3) & n_skiing(x1) & of(x1,x2) & n_skier(x2) & a_lone(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_person(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_snowman(x2))