Hack the Watson Glazer Test

All Real Estate assets are either very large or located in central areas but not both. While no apartment is untrendy, all trendy RE assets are very large.

Statement: Trendy real estate assets are either located in non-central areas or are small.

–The premise states that all trendy RE assets are very large, therefore the second part of this statement cannot be correct as trendy assets cannot be small. Although this conclusion is correct for the first part of the premise, it does not qualify after applying the second part of the premise.
Can someone explain why it does in fact follow the premise?