Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: The ecosystem is meant to break thru the wall of #apprehension. It's easy to follow a fave music star &amp; watch their goings on–but #dentists?
This tweet contains emotions: 
anticipation, fear, optimism, surprise