A group of snowmobile riders gather in the snow.
People ride snowmobiles in Yellowstone Park.
We do not know if the people are riding the snowmobiles in Yellowstone Park.
exists e1 s1 x1 x2 x3.(n_snow(x3) & in(e1,x3) & Actor(e1,x1) & v_gather(e1) & of(x1,x2) & n_rider(x2) & a_snowmobile(s1) & Theme(s1,x2) & n_group(x1))
exists e1 x1 x2 x3 x4.(ne_geo_park(x3) & (x3 = x4) & ne_geo_yellowstone(x4) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_snowmobile(x2) & n_people(x1))