A man is performing a water sport.
An ice skater skates on a frozen pond.
ONE CANNOT BE A WATER AND FROZEN SIMULTANEOUSLY
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_sport(x2) & of(x2,x3) & n_water(x3) & n_man(x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_pond(x3) & a_frozen(s1) & Theme(s1,x3) & Actor(e1,x1) & v_skate(e1) & n_skater(x1) & of(x1,x2) & n_ice(x2))