Punk rocker buys computer ink in the big-box store.
The singer pushes his shopping cart in the Office Max.
A punk rocker may not necessarily be a singer and there is no way of knowing if  the big box store is Office Max. If a person is buying computer ink he may not need to be pushing a shopping cart.
exists e1 s1 x1 x2 x3 x4 x5.(n_store(x5) & a_big-box(s1) & Theme(s1,x5) & in(e1,x5) & Theme(e1,x3) & Actor(e1,x1) & v_buy(e1) & n_ink(x3) & of(x3,x4) & n_computer(x4) & n_rocker(x1) & (x1 = x2) & ne_nam_punk(x2))
exists e1 x1 x2 x3 x4 x5.(ne_org_max(x4) & (x4 = x5) & ne_org_office(x5) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & of(x2,x1) & n_male(x1) & n_singer(x1) & Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & in(x2,x4))