Thread:GunjiBunny/@comment-24509764-20160614020139/@comment-24509764-20160615005517

Oh, that's a good point. Well, an artifact can be collected after the episode aired. However, it needed to have existed before that episode was created. An artifact born in 1750s can be collected in the 2000s, but one created in 1980 cannot have inspired a 1950s episode. Scroll through the person's history and use your own judgement. Ask yourself if the major event(s) they were known for had happened at the point you're looking at. As a general rule, look past their early history towards their young adulthood and beyond, as that's likely when the artifact was born.