Skiiers at the top of a snow covered hill.
Skiiers are returning to the top of a slope for another trip down the path.
The skiiers are either on top of a hill or returning to the top.
exists e1 x1 x2 x3 x4.(n_top(x2) & a_topic(x1) & at(x1,x2) & of(x2,x3) & n_hill(x3) & Theme(e1,x3) & v_cover(e1) & of(x3,x4) & n_snow(x4) & n_skiier(x1))
exists e1 x1 x2 x3 x4 x5 x6.(n_path(x6) & n_trip(x4) & n_top(x2) & to(e1,x2) & of(x2,x3) & for(x3,x5) & down(x5,x6) & n_trip(x5) & -(x5 = x4) & n_slope(x3) & Actor(e1,x1) & v_return(e1) & n_skiier(x1))