Complex sentence: Another Internet information service, a telephone directory, Canada 411.ca has become very popular since introduced in recent years, so much so that the delivery of the residential paper telephone book which was introduced to Canada in 1878, will cease in major cities in 2010.
Split into simpler sentences: Another Internet information service, the telephone directory Canada 411.ca, has become very popular since introduced in recent years. This has led to the delivery of the residential paper telephone book, introduced to Canada in 1878, being cancelled in major cities in 2010.