Surrounded by a team of Syriza higher-ups, Lafazanis has stepped up public appearances in Athens and elsewhere in the country that "strongly resemble the start of a campaign", a Syriza member said on condition of anonymity.
Take context from the input text and decide on the accurate relationship between 'Syriza' and 'Athens' from the options provided.
Options: distribution format, member of, parent organization, headquarters location