an old man cleans up while wearing an apron
There is someone cleaning
Sentence 2 is restating sentence 1.the someone cleaning is the old man
exists e1 e2 s1 s2 x1 x2.(while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_wear(e2) & n_apron(x2) & a_up(s2) & Manner(e1,s2) & Actor(e1,x1) & v_clean(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists p1 x1 x2 x3.((x1 = x2) & Time(x2,x3) & n_cleaning(x3) & n_person(x2))