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 obstacles builders Empire State Building faced attempting dirigibles dock include wind weather especially safety issues The excerpt states The winds top building constantly shifting due violent air currents This states nature great obstacle plan dirigibles dock Empire State Building The largest obstacle safety The excerpt says Most dirigibles outside United States use hydrogen rather helium hydrogen highly flamable Another main safety concern use lead weights anchor dirigible neither practical safe city pedestrians
user
Your evaluation score is: 4.0
assistant