title: 1996–97 South-West Indian Ocean cyclone season
context: The 1996–97 South-West Indian Ocean cyclone season was the longest on record, with both an unusually early start and unusually late ending. Most activity was from November through February. According to the Météo-France office (MFR) at Réunion, there were 21 tropical disturbances, 14 of which intensified into tropical depressions. There were 12named storms, beginning with Antoinette and proceeding sequentially until Lisette. In addition, the Joint Typhoon Warning Center also warned on storms in the region, which identified five other tropical storms. Five of the storms attained tropical cyclone status, or with 10–minute maximum sustained winds of at least 120km/h (75mph); of these, three strengthened further into intense tropical cyclones, with Daniella and Helinda tied for strongest storm of the season.
question: What was the most powerful storm in the 1996-97 South-West Indian Ocean cyclone season?
answers.text: Daniella and Helinda