Take context from the input text and decide on the accurate relationship between 'Independent Greeks' and 'Panos Kammenos' from the options provided.
Options: parent organization, stock exchange, chairperson, platform

"I think that the most important (thing) is that we are now able to design a long-term plan," Tsipras told Independent Greeks head Panos Kammenos during a meeting Monday to discuss the new government makeup.
chairperson