A group of people are hiking on a mountainside overlooking a lake surrounded by evergreens.
A group is on a nature tour.
Just because a group of people are hiking on a mountainside overlooking a lake surrounded by evergreens does not mean they are on a nature tour.
exists e1 e3 e2 x1 x2 x3 x4 x5 x6 x7.(on(e1,x3) & Theme(e3,x5) & Actor(e3,x4) & v_overlook(e3) & Actor(e2,x7) & n_evergreen(x7) & Theme(e2,x6) & v_surround(e2) & (x5 = x6) & n_lake(x5) & (x3 = x4) & n_mountainside(x3) & Actor(e1,x1) & v_hike(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1.(exists x2 x3.(on(x1,x2) & Time(x2,x3) & n_tour(x3) & n_nature(x2)) & n_group(x1))