First of all, the question doesn't mean anything. If you read it literally it's asking "how old is death on average in the united states in 2005?" How old is death? Next query should be "where is the nearest college level logic and critical thinking course?"
But maybe natural language queries will always work better if they are grammatical, because ungrammatical queries will have too many ambiguities to parse.
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[ 3.7 ms ] story [ 41.3 ms ] threadIf cuil had gone for the "Slowly grow organically, iterate, improve", it may well be grabbing market share by now, instead of being dead.
Median and Mean are both "average." You get what you search for.
If it had the average age, or the mean age, then it would have given it to you.