Refer to the input text as context and select the correct relationship between 'Opap' and 'lottery' from the available options.
Options: distributed by, product/material produced, position held, industry

The largest five companies listed in Greece are Coca-Cola Hellenic - the world's second largest Coca-Cola bottler - Hellenic Telecom, National Bank (NYSE: NBHC - news ) of Greece, Opap - which runs the Greek national lottery - and Alpha Bank (Other OTC: ALBWF - news ) .
product/material produced