Complex sentence: Until March 2004, the "Wing Express" Limited Express service complemented the Narita Express with one return working a day between Ōmiya/Ikebukuro/Shinjuku and Narita Airport.
Split into simpler sentences: Until March 2004, another Limited Express service complemented the Narita Express. This train, the "Wing Express", had one return working a day between Omiya/Ikebukuro/Shinjuku and Narita Airport.