instruction:
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
question:
That year the chocolate magnate Peter Ludwig agreed to endow 350 modern artworks--then valued at $45 million --and in return the City of Cologne committed itself to build a dedicated ''Museum Ludwig'' for works made after the year 1900.
answer:
The Museum Ludwig was named for whom?


question:
Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein.
answer:
When was Einsteinium first discovered?


question:
The Soviet RPG-22 Netto is a one-shot disposable anti-tank rocket launcher first deployed in 1985, based on the RPG-18 rocket launcher, but firing a larger 72.5 mm fin stabilised projectile.
answer:

What was the year RPG-22 entered service?