I would put a comma after "know". "go see" is informal AmE. In everyday BrE it would be "go and see".
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I would put a comma after "know".
"go see" is informal AmE. In everyday BrE it would be "go and see". Most proper is "go to see". If in doubt, I suggest that you use "go to see".
The transition of ideas from the first to second sentence is just a little abrupt.