Former Formula One and Indycar champion Nigel Mansell became involved as an ambassador for the series after his sons , Leo and Greg , began their single seater careers in the championship in 2006 .
Head entity: leo Q427791 20
Tail entity: nigel mansell Q10501 6 7
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22