Sentence 1: Manufactured in Mons (now in Belgium), the gun was state-of-the-art for the times, firing cannonballs weighing up to 150-kg (331-lbs).

Sentence 2: The gun was produced in 1495.
Options are:
- yes;
- it is not possible to tell;
- no;
Is this second sentence entailed by the first sentence?
it is not possible to tell