premise: Man reading a book while working as a street vendor.
hypothesis: A man reads a book about sports while working.
explanation_1: Just because the man is reading a book while working doesn't mean that it's specifically a sports book.
explanation_2: about sports is too specified
explanation_3: Not every book is about sports.
premise_logic: exists e2 e1 x1 x2 x3 x4 x5.(a_topic(x1) & while(e1,e2) & as(e2,x4) & n_vendor(x4) & of(x4,x5) & n_street(x5) & Actor(e2,x2) & v_work(e2) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_book(x3) & (x1 = x2) & n_man(x1))
hypothesis_logic: exists e2 e1 x1 x2 x3.(while(e1,e2) & Actor(e2,x1) & v_work(e2) & Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & about(x2,x3) & n_sport(x3) & n_book(x2) & n_man(x1))