Complex sentence: In the past, Bedlinog was also nicknamed "Little Moscow" owing to the relatively high concentration of communists, especially during the strikes in the 1930's when some communists of the village volunteered to travel to Spain to fight in the Spanish Civil War.
Split into simpler sentences: In the past, Bedlinog was also nicknamed "Little Moscow" owing to the relatively high concentration of communists in the village. During the the 1930's communists from the village volunteered to travel to Spain to fight in the Spanish Civil War.