People standing around on sand in the rain.
The people are standing on concrete.
sand and concrete is various types of flooring
exists e1 p1 x1 x2 x3 x4.(n_rain(x4) & a_topic(x1) & in(e1,x4) & on(e1,x3) & n_sand(x3) & exists s1.(Theme(s1,x2) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(n_people(x1) & on(e1,x2) & n_concrete(x2) & Actor(e1,x1) & v_stand(e1))