Given a piece of financial news and its polarity, classify it into 'true' if the polarity is correct and classify into 'false' if the polarity is incorrect. Output must be 'true' or 'false'.

Input: Consider Input: news:Nyrstar has also agreed to supply to Talvivaara up to 150,000 tonnes of sulphuric acid per annum for use in Talvivaara 's leaching process during the period of supply of the zinc in concentrate .
polarity:positive

Output: true

Input: Consider Input: news:Lemcon signed an investment cooperation agreement with the Kaluga regional administration last November .
polarity:neutral

Output: false

Input: Consider Input: news:Several large stocks tacked lower , however .
polarity:negative
Output: true