Question:
From Otemachi subway station, you enter the gardens at the Otemon Gate and wander through hedgerows of white and pink azaleas, around ponds and little waterfalls edged with pines, plum trees, canary palms, and soft green cryptomeria japonica.

Does it follow that "You cannot enter the gardens at the Otemon Gate coming from the Otemachi subway station. "?
Answer:
no

Question:
The first two-thirds are lined with car salesrooms, cinemas, shops, and (expensive) cafe terraces.

Does it follow that "The last third is not filled with car salesrooms and cinemas."?
Answer:
yes

Question:
As more people live longer, there will be relatively fewer workers supporting each retiree unless retirement patterns change.

Does it follow that "As more people live longer, more people will be alive on Earth"?
Answer:
it is not possible to tell

Question:
well go ahead i'll let you start

Does it follow that "You may proceed."?
Answer:
yes