An elderly checks out the samples.
The person is in a store
Samples can be in places other than a store.
exists s1 x1 x2.(n_sample(x2) & a_topic(x1) & out(x1,x2) & n_check(x1) & a_elderly(s1) & Theme(s1,x1))
exists p1 x1.(n_person(x1) & exists x2.(in(x1,x2) & n_store(x2)))