A large group of people shopping in a marketplace at night.
A group of people are shopping at night.
"People are shopping" is a rephrasing of "people shopping.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & at(e1,x5) & n_night(x5) & in(e1,x4) & n_marketplace(x4) & Actor(e1,x3) & v_shop(e1) & (x2 = x3) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(at(e1,x3) & n_night(x3) & Actor(e1,x1) & v_shop(e1) & of(x1,x2) & n_people(x2) & n_group(x1))