Determine the emotional tone of the following tweet: "#Spina #Bifida a #neural #tube #birth #defect where the #nervous #system &amp; #spinal #cord do not fully develop #raredisease #June #awareness". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".