An adult and a child walk along the beach during the day.
The adult was indoors.
Two people are not one. People cannot walk on the beach indoors.
exists s1 x1 x2 x3 x4 x5.(n_day(x5) & n_beach(x4) & a_topic(s1) & subset_of(x2,s1) & during(x2,x5) & along(x2,x4) & n_walk(x2) & of(x2,x3) & n_child(x3) & subset_of(x1,s1) & n_adult(x1))
exists p1 x1.(n_adult(x1) & exists x2.((x1 = x2) & n_indoor(x2)))