A month always starts on or near a new moon and has either 29 or 30 days (a lunar cycle is about 29 1/2 days).
(A month; starts; T:on or near a new moon; T:always) (A month; has; either 29 or 30 days) (a lunar cycle; is; about 29 1/2 days)
A month A month a lunar cycle
starts has is
T:on or near a new moon T:always
either 29 or 30 days
about 29 1/2 days