Context:
Apart from the new substances entering the market, the phase out of existing ones, which have been definitely identified as damaging the ozone layer, is far from complete.
Hypothesis: Ozone damaging substances are being taken off the market.
Yes
Context:
How to prevent feline upper respiratory illness<br>Get your cat vaccinated. Vaccination against cat flu is considered an essential vaccine. The flu vaccine needs to be given regularly and it comes in a variety of types (modified live, modified live intranasal, killed vaccine) which determines how often the vaccine needs to be given.
Hypothesis: The cat flu vaccine comes in the modified live intranasal type.
Yes
Context:
Silvana, J. 87, is an opera by Carl Maria von Weber, first performed in Frankfurt am Main on 16 September 1810. The libretto, by , is a reworking of an earlier, unsuccessful opera by Weber, "Das Waldmädchen ". Weber also reused music from the same piece in "Silvana".
Hypothesis: Silvana was composed in the 18th century but not performed until the 19th century.

It's impossible to say