Sentence 1: Its base was measured in kilometers instead of yards, and its top was going to be proportionally high, apparently.

Sentence 2: Its base was measured in kilometers instead of yards.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: A visit to the dam brings home the immense technological feat and allows you to gaze out over Lake Nasser, created by the blocking of the river, which is now over 500 km (310 miles) in length, spanning the border with Sudan.

Sentence 2: Lake Nasser runs from Egypt into Sudan.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: a little bit humid clear blue sky and the sunshine and the Rangers don't play many afternoon games because of the heat we have here in the summer

Sentence 2: The sky is very clear and blue.
Is this second sentence entailed by the first?

Answer:
yes