 Galveston contains one of the largest and historically significant collections of 19th @-@ century buildings in the United States . Galveston 's architectural preservation and revitalization efforts over several decades have earned national recognition . 
 Galveston <a href='uninflect' title='1'><mark>contains</mark></a> one of the largest and historically significant collections of 19th @-@ century buildings in the United States . Galveston <a href='null_genetive' title='2'><mark>'s</mark></a>architectural preservation and revitalization efforts over several decades <a href='been_done' title='3'><mark>have</mark></a> earned national recognition . 
Galveston contain one of the largest and historically significant collections of 19th @-@ century buildings in the United States . Galveston  architectural preservation and revitalization efforts over several decades done earned national recognition .