Three people stand in line waiting to buy something to eat at a fair booth selling Martins' Famous Louisiana Sausage's (sic).
People are waiting to purchase some food
People standing in line waiting to eat something implies they are waiting to purchase some food and Sausages are food.
exists e1 e2 p1 x1 x2.(for(e1,e2) & Topic(e2,p1) & Actor(e2,x1) & v_wait(e2) & exists e3 p2 x3.(Topic(e3,p2) & exists e5 e4 s1 s2 s3 x4 x5 x6 x7 x8 x9 x10.(at(e4,x4) & Theme(e5,x7) & Actor(e5,x5) & v_sell(e5) & Theme(s3,x10) & a_sic(s3) & (x7 = x10) & n_'s(x7) & (x7 = x9) & ne_org_sausage(x9) & (x7 = x8) & ne_org_louisiana(x8) & a_famous(s2) & Theme(s2,x7) & of(x7,x6) & n_martin(x6) & (x4 = x5) & n_booth(x4) & a_fair(s1) & Theme(s1,x4) & Actor(e4,x1) & v_eat(e4)) & Theme(e3,x3) & Actor(e3,x1) & v_buy(e3) & n_thing(x3)) & in(e1,x2) & n_line(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & card_eq_3(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_purchase(e2) & n_food(x2)) & n_people(x1))