Complex sentence: The first full-service spa was introduced in 1986 at Four Seasons Resort and Club Dallas at Las Colinas and today, nearly all Four Seasons hotels and resorts have spa facilities, and the remainder offer spa services.
Split into simpler sentences: The first full-service spa was introduced in 1986 at Four Seasons Resort and Club Dallas at Las Colinas. Today, nearly all Four Seasons hotels and resorts have spa facilities, and the remainder offer spa services.