Question: Archaeological excavations have revealed evidence of habitation here as long ago as 900 b.c.
Despite their best efforts, the archaeologists were unable to find proof of habitation here.

Answer: no

Question: She keeps the fatal letter."
She threw the fatal letter away.

Answer: no

Question: The methods for this calculation are similar to the procedure for recreational benefits.
The calculation methods are similar to how to recreational benefits are preformed

Answer:
yes