No predicate necessary?
"In most cases, cities that grow into each other's space lose their individual identities, and the border or barrier that still separates them becomes almost irrelevant. An 1873 case of twin cities becoming united cities is Budapest in Hungary, which began as two settlements (Buda and Pest) facing each other across the Danube at a strategic fording place along a trade route."
The second sentence doesn't seem to contain a predicate. Itäs not the first time I notice such a sentence. Is it normal for English language or shold there be: "There is an 1873 case..." ?