claim: A thunderstorm requires the presence of white lightning.
evidence: The 1990 Rothmans Grand Prix was a professional ranking snooker tournament held at the Hexagon Theatre in Reading , England .. Rothmans. Rothmans International. Grand Prix. World Open ( snooker ). Hexagon Theatre. The Hexagon. Reading. Reading, Berkshire. England. England. ranking. Snooker world rankings. snooker. snooker. Stephen Hendry won in the final 10 -- 5 against Nigel Bond .. Stephen Hendry. Stephen Hendry. Nigel Bond. Nigel Bond