ephemeral - collective
"Taco trucks formed a "wall" outside the Trump International Las Vegas hotel, hours before the presidential debate Wednesday.
"If you don't get out and vote, this clown could be president," a worker told the crowd as he pointed at the building... The rally was organized by the Culinary Workers Union, which vociferously opposes Trump."
Source : cnn.com
collective - permanent
"Border City presents a vision for a bi national city on one of the world’s most important borders, that of the United States and Mexico, whose boundary states are now home to over 100 million people. The concept is rooted in the long history of places where frontiers meet, cities where cultures both clash and blend. while recognizing shortcomings in urban planning...might offer a new model for cities as populations grow, migration increases, and economies continue to globalize."