A group of people gather in front of an open business.
people are gathering
Gathering in second sentence refers to the group of people that gather in the first sentence.
exists e1 s1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_business(x4) & a_open(s1) & Theme(s1,x4) & n_front(x3) & Actor(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1.(Actor(e1,x1) & v_gather(e1) & n_people(x1))