Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's mental state.
Tweet: There will be no #gaming video today. An old friend of mine passed last night, so I'm taking some time to grieve. Thank you #StandUpToCancer
This tweet contains emotions: 
sadness