Complex sentence: Ukrainian branches of the party were founded in Winnipeg, Portage la Prairie, and Nanaimo in 1907; four more followed in early 1908; and there was an unsuccessful attempt to launch a Ukrainian Socialist Alliance within the party in the same period.
Split into simpler sentences: Ukrainian branches of the SPC were founded in Winnipeg, Portage la Prairie, and Nanaimo in 1907, and four more followed in early 1908. There was also an unsuccessful attempt to launch a Ukrainian Socialist Alliance within the SPC during the same period.