Based on the third test, the function still shows selectivity towards air travel-related terms, and we can now also observe selectivity towards sky-related terms, like "sky." It also shows some selectivity towards locations like "New York" and famous landmarks like the "Eiffel Tower."

After running these tests, the description of the function is as follows:

[DESCRIPTION]: The function is selective towards terms related to air travel, sky-related terms, and to a lesser extent, famous landmarks and locations. The more closely associated a word is with air travel or the sky, the higher the output value, approaching 1.