extract string

[Kevin D. Clark]

Zhao Peng <greenmt at gmail.com> writes:

> You said that "there is an extra column in the 3rd line". I disagree
> with you from my perspective. As you can see, there are 3 commas in
> between "jesse" and "Dartmouth college". For these 3 commas, again, if
> we think the 2nd one as an merely indication that the value for age
> column is missing, then the 3rd line will be be read as ["jesse",
> MISSING, "Dartmouth college"], not ["jesse",empty,empty, "Dartmouth
> college"] as you suggested.