Whether Syriza leader Alexis Tsipras or his New Democracy opponent Evangelos Meimarakis triumph in the election on Sunday that is too-close-to-call, Mr Dallara said volatility induced by Greece "is highly likely to rear its head again.
What is the relationship between 'Syriza' and 'Alexis Tsipras' in the context of the input sentence.
Options: business division, parent organization, chairperson, distribution format