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"): This is the third mall to be built in Houston after Gulfgate Mall opened in 1956 and Meyerland Plaza in 1957, but the first fully air-conditioned mall in Houston.
Relevant evidence: Yes