A large group of people crosscountry skiing in the snow.
A crosscountry ski trip being enjoyed by a family.
A group could ski without being on a trip, without having enjoyed it and not be a family.
exists s1 x1 x2 x3 x4.(n_snow(x4) & a_topic(x1) & in(x1,x4) & n_crosscountry(x1) & Time(x1,x3) & n_skiing(x3) & of(x1,x2) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Actor(e1,x4) & n_family(x4) & Theme(e1,x3) & v_enjoy(e1) & (x1 = x3) & n_trip(x1) & of(x1,x2) & n_ski(x2) & a_crosscountry(s1) & Theme(s1,x1))