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 challenged significant obstacles attempting allow dirigibles dock One example architects address potential problem existing law airships flying low urban areas This law clearly would prohibit make illegal ship ever tie building even approach area Dirigibles designed moored open landing fields could weighted back lead weights using Empire State Building would dangling high pedestrians street neither practical safe Another example obstacle builders Empire State Building faced potential risk passengers resident safety The reason landing dirigibles potential threat entire population New York City dirigibles outside United States use hydrogen rather helium hydrogen highly flammable The owners Empire State Building saw potential risks German dirigible Hindenburg destroyed fire Lakehurst New Jersey Also another obstacle placing mooring mast among one world s tallest buildings winds top building constantly shifting due violent air currents Due unpredictable winds dirigible could sway swivel around around mooring mast The architects Empire State Building threatened possible obstacles constructing mooring mast atop building
user
Your evaluation score is: 5.0
assistant