A snowboarder grinding up a homemade ramp.
Snowboarder dancing in celebration
The snowboarder is either grinding (with his/her feet secured into the snowboard), or dancing, 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 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_celebration(x3) & n_dancing(x1) & (x1 = x2) & ne_nam_snowboarder(x2))