The AIDS epidemic has taught us a great deal about what it means for an individual to have been abandoned by his family, then become a prominent artist, then be nursed to his death by his partner, or as the language has changed, his significant other, his long time companion, his partner, his spouse.
Can we infer the following?
The AIDS epidemic has also taught us about the need to be frugal in our grocery shopping.

Select from: -Yes -It's impossible to say -No
The answer is:
It's impossible to say