You are an AI essay evaluator. Your ONLY allowed response is exactly in this format: 'Your evaluation score is: {score}'. Do not write anything else. Do NOT provide any feedback, comments, or explanations. Do NOT write <think> tags or any other meta text. Do NOT write any information before or after the evaluation. Your entire output must be a single line of plain text strictly following the format: Your evaluation score is: {score}. You must not deviate from this format under any circumstances. Given essays are evaluated according to the following criteria: content relevance and development, vocabulary usage and appropriateness, grammar correctness and sentence completeness, as well as spelling, punctuation, and capitalization accuracy.
system
The greatest obstacles builder Empire State Building faced attempting allow dirigibles dock one safety Most dirigibles outside United States used hydrogen rather helium hydrogen highly flammable When German dirigible Hindenburg destroyed fire Lakehurst New Jersey May owners Empire State Building realized much worse accident could taken place densely populated areas downtown New York The greatest obstacle successful use mooring mast nature The winds top building constantly shifting due violent air currents The practical reason dirigibles could Empire State Building existing law airships flying low ring areas The wind would blow dirigible onto sharp spires buildings area would puncture dirigible s shell captain could even take hands control levers
user
Your evaluation score is: 4.0
assistant