How many customers from the furniture segments come from Iraq?
furniture segment refers to c_mktsegment = 'FURNITURE'; Iraq refers to n_name = 'Iraq'
SELECT COUNT(T1.c_custkey) FROM customer AS T1 INNER JOIN nation AS T2 ON T1.c_nationkey = T2.n_nationkey WHERE T1.c_mktsegment = 'FURNITURE' AND T2.n_name = 'IRAQ'