Several students waiting outside an igloo.
There are people sunning on the beach
People can be either sunning or waiting, not both.  An igloo is not found on the beach.
exists e1 s1 x1 x2 x3.(a_topic(x1) & outside(e1,x3) & n_igloo(x3) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_student(x1) & a_several(s1) & Theme(s1,x1))
exists p1 x1 x4.(n_beach(x4) & exists e1 x2 x3.((x1 = x2) & on(e1,x4) & Actor(e1,x3) & v_sun(e1) & (x2 = x3) & n_people(x2)))