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 builders Empire State Building faced many obstacles attempting allow dirigibles dock First architects could simply drop mooring mast top Empire State Building s flat roof A thousandfoot dirigible moored top building held single cable tether would add stress buildings frame To prevent steel frame Empire State Building would modified strengthened accommodate new situation Secondly dirigibles outside used hydrogen rather helium hydrogen highly flammable The owners realized one hydrogen dirigibles catch fire like Hindenburg Lakehurst accident could much worse taken place densely populated areas downtown New York The greatest obstacle builders faced violent air currents dirigible tethered The back ship would swivel around mooring mast due winds using lead weights weight back would dangling pedestrians would neither practical safe The mooring mast Empire State Building destined never fulfill purpose reasons apparent ever constructed
user
Your evaluation score is: 5.0
assistant