Given a text, write a compressed version of it in a single sentence.

Q: NIDA: "Long-term use of marijuana produces changes in the brain that are similar to those seen after long term use of other major drugs of abuse such as cocaine, heroin, and alcohol."

A: Long-term use of Marijuana alter the brain similarly to those seem after long-term use of other abusable drugs.
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Q: But natural games are not quite so straightforward. I begin by mentioning again the rather surprising no-free-lunch theorem proved by Bill Macready and David Wolpert as postdoctoral fellows at the Santa Fe Institute a few years ago.

A: Natural games aren't so straightforward plus the surprising no-free-lunch theorem proved by Bill Macready & David Wolpert, at Santa Fe Institute a few years ago.
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Q: But some analysts questioned how much of an impact the retirement package will have, because few jobs will end up being eliminated. " It's a cosmetic move, " said Jonathan S. Gelles of Wertheim Schroder & Co.

A:
Some analysts questioned how much of an impact the package will have, few jobs will end up being ended. "It's a cosmetic move," said Jonathan S. Gelles.
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