Task: Identify the emotional nuances in the tweet, classifying it as either 'neutral or no emotion' or as one or more of the designated emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that accurately reflect the expressed sentiment.
Tweet: Today marks seven years since the Kyadondo terrorist attack where many lost loved ones. We mourn &amp; pray they continue resting in peace. 7/11
This tweet contains emotions: 