A snowboarder grinding up a homemade ramp.
A person is drinking hot chocolate by a fire.
The snowboarder is either grinding or drinking hot chocolate, not both simultaneously.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_grind(e1) & n_ramp(x3) & of(x3,x4) & n_homemade(x4) & (x1 = x2) & n_snowboarder(x1))
exists e1 s1 x1 x2 x3.(by(e1,x3) & n_fire(x3) & Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_chocolate(x2) & a_hot(s1) & Theme(s1,x2) & n_person(x1))