Many people are gathered together in a flea market type setting.
There are many people in a flea market.
Because many people are gathered in a flee market-type setting, it is reasonable to infer that they are at a flea market to begin with.
exists e1 s1 x1 x2 x3 x4 x5.(in(e1,x2) & n_setting(x2) & of(x2,x5) & n_type(x5) & of(x2,x4) & n_market(x4) & of(x2,x3) & n_flea(x3) & a_together(s1) & Manner(e1,s1) & Theme(e1,x1) & v_gather(e1) & n_people(x1) & n_quantity(x1))
exists p1 x1 x2 x3.(in(p1,x2) & n_market(x2) & of(x2,x3) & n_flea(x3) & exists x4.((x1 = x4) & n_people(x4) & n_quantity(x4)))