SELECT avg(T1.ROM_MiB) FROM chip_model AS T1 JOIN phone AS T2 ON T1.Model_name  =  T2.chip_model WHERE T2.Company_name = "Nokia Corporation";
What is the average ROM size of phones produced by the company named "Nokia Corporation"?
SELECT avg ( T1.ROM_MiB ) FROM chip_model AS T1 JOIN phone AS T2 ON T1.Model_name = T2.chip_model WHERE T2.Company_name = `` Nokia Corporation '' ;
select avg ( t1 . rom_mib ) from chip_model as t1 join phone as t2 on t1 . model_name = t2 . chip_model where t2 . company_name = value
What is the average ROM size of phones produced by the company named `` Nokia Corporation '' ?