Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: Flight 815 crashed on The Lost Island 2004 #lost @JoshuaJThurston
This tweet contains emotions: 
sadness