Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
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