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: @rickygervais my first time in Slough so checked out the new station floor #sad #LifeOnTheRoad
This tweet contains emotions: 
sadness