a group of people under a white party tent.
There is a group under a white tent for partying.
A group of people implies that there is a group, and party tent can be rephrased as tent for partying
exists s1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & under(x2,x3) & n_tent(x3) & of(x3,x4) & n_party(x4) & a_white(s1) & Theme(s1,x3) & n_people(x2) & n_group(x1))
exists p1 x1 s1 x2 x3 x4.((x1 = x2) & under(x2,x3) & for(x3,x4) & n_partying(x4) & n_tent(x3) & a_white(s1) & Theme(s1,x3) & n_group(x2))