Definition: Classify the given a piece of financial news into three classes: positive, negative, and neutral. Output must be 'positive', 'negative', or 'neutral'.
Input: Finnish Okmetic that manufactures and processes silicon wafers for the semiconductor and sensor industries and Norwegian solar wafer company NorSun have signed a contract under which Okmetic will supply NorSun mono silicon crystals for use in solar cell manufacturing .

positive