Per week?
( ( Per week ) ? )
(ROOT (SQ (VP (VB Per) (NP (NN week))) (. ?)))
The week is the first in the month.
( ( The week ) ( ( is ( ( the first ) ( in ( the month ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN week)) (VP (VBZ is) (NP (NP (DT the) (JJ first)) (PP (IN in) (NP (DT the) (NN month))))) (. .)))