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 Mooring Mast Marcia Amidon Lsted describes building mast Empire State Building The mast originally added add height thousand foot building However Al Smith one builders wanted mast serve higher calling providing docking station dirigibles This idea proved challenging First builders change structure tower make strong enough support weight dirigible swaying wind Lsted writes The stress dirigible s load Would transmitted way building s foundation When mast finally built builders faced problem dirigibles dangling high pedestrians street If one ever fell hundreds people killed Finally law prevented airships flying low urban areas By docking Empire State Building dirigibles would breaking law Although good idea The Mooring Mast shows would possible dirigibles dock atop Empire State Building
user
Your evaluation score is: 4.0
assistant