What is the fine-grained topic of the following text: Having been comprehensively and lovingly restored, Mariska is not only an icon of the classic fleet but a serial regatta winner, taking the silverware at the Giraglia, Puerto Sherry, San Remo and St Tropez regattas – known as a ‘Grand Slam’ – in both 2016 and 2017. Only return the topic.
Mariska's restoration and regatta victories