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 builder Empire State Building faced attempting allow dirigibles dock lot They trouble area thing going job The one obstacle expanded used New York City lack suitable landing area Another obtacle mooring mast greatest obstacle successful mooring mast nature The winds top building constantly shifting due violent air currents Even dirigible tethered mooring mast back ship would swivel around around mooring mast Then existing law airships flying low urban areas would become illegal ship pass tie building even approach area
user
Your evaluation score is: 4.0
assistant