user: Question: What's the green communist when Euroteste/JN is the polling Institute?
Columns: ['Date Released', 'Polling institute', 'Social Democratic', 'Socialist', 'Green-Communist', 'Democratic and Social Centre', 'Lead']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['October 6, 1991', 'Election Results', '50.6% 135 seats', '29.1% 72 seats', '8.8% 17 seats', '4.4% 5 seats', '21.5%']
SQL:

assistant: SELECT "Green-Communist" FROM "Table" WHERE "Polling institute" = 'Euroteste/JN';