Question:
It was only in 1913, under the leadership of Eleftherios Venizelos, a native Cretan, that the longed-for enosis (union) was achieved.

Does it follow that "It was not until 1913 that a union was established."?
Answer:
yes

Question:
However, if it was the friends' mistake, we have no desire to embarrass them with their error.

Does it follow that "We don't want to embarrass our friends, so we just pretend they're right."?
Answer:
it is not possible to tell

Question:
It would be impractical and contrary to the public interest to publish the rules prior to making the rules effective.

Does it follow that "It might be impractical to publish the rules first, but it would be more democratic. "?
Answer:
it is not possible to tell

Question:
And, best of all, there are underwater observatories sunk into the sea 90 metres (300 feet) offshore at the end of a pier so you can see what is happening in the Coral Beach Nature Reserve.

Does it follow that "You can find the underwater observatories at the end of the pier."?
Answer:
yes