A street vendor is gathering bread and pretzels to sell.
There is mustard on the cart.
Not every vendor uses mustard, so there is not necessarily mustard on the cart.
exists e1 e2 p1 x1 x2 x3 x4 x5.(Topic(e2,p1) & Actor(e2,x4) & v_pretzel(e2) & exists e3.(Actor(e3,x4) & v_sell(e3)) & n_vendor(x4) & of(x4,x5) & n_street(x5) & Theme(e1,x3) & Actor(e1,x1) & v_gather(e1) & n_bread(x3) & n_vendor(x1) & of(x1,x2) & n_street(x2))
exists p1 x1 x3.(n_cart(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_mustard(x2)))