premise: Grading and pricing fish in an open air fish market.
hypothesis: Fresh fish are for sale at an outdoor marketplace.
explanation_1: pricing fish means they are for sale
explanation_2: fish market is an outdoor market place.
explanation_3: "fresh fish for sale" is a rephrase of "grading and pricing fish
premise_logic: exists s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_market(x4) & of(x4,x6) & n_fish(x6) & of(x4,x5) & n_air(x5) & a_open(s2) & Theme(s2,x4) & n_fish(x2) & of(x2,x3) & n_pricing(x3) & subset_of(x1,s1) & n_grading(x1))
hypothesis_logic: exists p1 s1 x1.(exists s2 x2 x3.(for(x1,x2) & at(x2,x3) & n_marketplace(x3) & a_outdoor(s2) & Theme(s2,x3) & n_sale(x2)) & n_fish(x1) & a_fresh(s1) & Theme(s1,x1))