Complex sentence: The 2017 Pacific hurricane season was a somewhat active Pacific hurricane season, featuring eighteen named storms, nine hurricanes, and four major hurricanes, although, the season was significantly less active than the previous three seasons.
Split into simpler sentences: The 2017 Pacific hurricane season was a somewhat active Pacific hurricane season, featuring eighteen named storms, nine hurricanes, and four major hurricanes. Although, it was significantly less active than the previous three seasons.