Exercise; adding or removing commas. -- Alina Tugend

[Aikuzo]

Instruction: Edit the following essay by adding or removing commas.

2. Alina Tugend, a writer for the New York Times, has written about the stressed business traveler. According to Tugend, business travel is not as exciting as it appears. Frequent traveler, which is defined as six or more business trips each year, can cause eating, sleeping, and breathing disorders. It can also cause serious heart problems,(no comma should be here) that require hospitalization. Executive Ted Burke, for example, had a stroke that may have been linked to his long hours spent on airliners.

Perfect right? xD
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I quit studying English years ago and have just come back to study the basics.

[Cerberus™]

Perfect - assuming that "frequent traveler" was meant to be "frequent travel".

[Aikuzo]

I typed it wrong: you're right!

I need some help on this one:
- The restaurant, which is on Labelle boulevard, has excellent seafood.

Usually my guideline is, I take out the interrupting phrase then I check if it still has the same meaning; which on this case "The restaurant has excellent seafood." assuming that the audience already know the particular restaurant that was being talked about. Otherwise, if the audience still don't know what restaurant is being talked about, like for example, if that entire sentence is the very first sentence in the paper; then it should be like "The restaurant which is on Labelle boulevard has excellent seafood.(there should be no comma)" because the 'which is on Labelle boulevard there is necessary to point out which particular restaurant is being talked about. And, this time, it's not just there to add an "extra" unnecessary information.

Did I analyze these all correctly?

(P.S. Now, now, I stumbled whether to use semi-collons or what lol)
_________________
I quit studying English years ago and have just come back to study the basics.

[Cerberus™]

Your analysis is correct in every detail! You fully understand the difference between defining and non-defining. One thing to note is that it is best not to use "which" for defining relative clauses, unless the relative clause starts with a preposition.

Where did you have trouble with semicolons?