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This tag is for questions about punctuation. This encompasses marks such as the period/full stop, comma, dash, and parentheses, used to separate structural units and perform other roles that clarify the meaning. USE THE 'SYMBOLS' tag for currency symbols, accents and so forth.
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Commas after introductory pieces of information
I got confused by the sentence:
An investigation took place,and five months later Dan was exonerated and returned to active duty.
I wonder whether a comma may(or should) be inserted after the wo …
2
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3
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Are the commas here correct? "...a vaccine was finally discovered by an American scientist, ...
Before a vaccine was finally discovered by an American scientist, Jonas Salk, in 1955, more than 80 percent of polio patients received help from the foundation.
Why is "Jonas Salk" set off by com …