Utilize the input text as a context reference, choose the right relationship between 'Opap' and 'lottery' from the options.
Options: industry, position held, product/material produced, distributed by

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