List all genes whose interaction is with genes located in the nucleus in which it is positively correlated.
If the Expression_Corr value is positive then it's positively correlated
SELECT T1.GeneID FROM Genes AS T1 INNER JOIN Interactions AS T2 ON T1.GeneID = T2.GeneID1 WHERE T2.Expression_Corr > 0 AND T1.Localization = 'nucleus'