A surfer in a blue swimsuit is riding the waves.
A climber is climbing a mountain.
There can be either a surfer or a climber. One cannot be riding waves and climbing a mountain simultaneously.
exists e1 s1 x1 x2 x3.(n_wave(x3) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & in(x1,x2) & n_swimsuit(x2) & a_blue(s1) & Theme(s1,x2) & n_surfer(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_mountain(x2) & n_climber(x1))