Complex sentence: In addition to power transmission technology, Hydro-Québec plans to offer high-speed internet over its transmission lines within a few years; the utility started testing internet over its lines in January 2004.
Split into simpler sentences: In addition to power transmission technology, Hydro-Québec plans to offer high-speed internet over its transmission lines within a few years after conducting tests. The utility started testing internet over its lines in January 2004.