Townspeople gathered for a festival.
A man knew about a festival but didn't go.
Townspeople indicates more than a man. One couldn't be gathered somewhere if one didn't go.
exists e1 x1 x2.(ne_nam_townspeople(x1) & for(e1,x2) & n_festival(x2) & Actor(e1,x1) & v_gather(e1))
exists e1 x1 x2 x3.(-exists e2.(Actor(e2,x3) & v_go(e2)) & n_man(x3) & about(e1,x2) & n_festival(x2) & Actor(e1,x1) & v_know(e1) & n_man(x1))