GMAT Sentence Correction (SC) | Re: In 1713, Alexander Pope began his translation of the Illiad,

In 1713,Alexander Pope began his translation of the Illiad, awork that, taking him seven years until completion, and that literary critic Samuel Johnson, Pope’s contemporary,pronounced the greatest translation in anylanguage.

Meaning :
Alexander Pope began his translation of Illiad and this took him seven years to complete. This work was pronounced the greatest translation in any language.

Sentence analysis:
Alexander Pope (Subject)...............began (verb)

that (subject