Complex sentence: Between 1897 and 1914, applications were received from a number of other boroughs, but only one was successful: in 1905, Cardiff was designated a city and granted a lord mayoralty as "the Metropolis of Wales".
Split into simpler sentences: Between 1897 and 1914 applications were received from a number of other boroughs but only one was successful. In 1905, Cardiff was designated a city and granted a lord mayoralty as "the Metropolis of Wales".