Question: PlazAmericas was the third mall to be built in Houston, after Gulfgate Mall and a large shopping center that is located in what part of Houston, Texas?
Sentence (from "PlazAmericas"): PlazAmericas, formerly known as Sharpstown Mall and earlier Sharpstown Center, is a shopping mall located in the Sharpstown development in Greater Sharpstown, Houston, Texas.
Relevant evidence: No