Question:
The king was converted and the plant has been a symbol of Ireland ever since.

Does it follow that "The plant was a symbol of Ireland."?
Answer:
yes

Question:
But it's not locked now.

Does it follow that "But it's still locked."?
Answer:
no

Question:
What form of wonder is a computer?" Dave shook his head at the old man's monomania.

Does it follow that "Dave was not amused by the man's enthusiasm. "?
Answer:
yes

Question:
Even that last picture of Tommy, revolver in hand, failed to comfort her.

Does it follow that "She felt worse than ever seeing the picture of Tommy holding the revolver."?
Answer:
no