After the autumnal equinox, when the nights become longer than days, these plants need to have 14 hours of total darkness for about three weeks.
(the nights; become; longer than days) (these plants; need; to have 14 hours of total darkness for about three weeks; T:After the autumnal equinox; T:when the nights become longer than days) Context(these plants need,List([69, 86))):(these plants; need to have; 14 hours of total darkness; T:for about three weeks)
these plants need,List([69, 86))
the nights these plants these plants
become need need to have
longer than days
to have 14 hours of total darkness for about three weeks T:After the autumnal equinox T:when the nights become longer than days
14 hours of total darkness T:for about three weeks