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
When builders took difficult task building mooring mast top structure dirigibles dock faced various obstacles made difficult carry plan One first obstacles faced fact could nt slap long mooring mast building s flat roof The huge dirigible would held one cable tether would add immense amount stress building s frame fandation The builders responded constructing even stronger frame building The main problem builders faced trying allow dirigibles dock top structure safety issues Dirigibles aside mostly used hydrogen instead helium Hydrogen extremely flammable increases risk fire Since blimps would thousands pedestrians city risk blimp catching fire much high On top winds top Empire State Building always Shifting due violent air currents causing blimp swivel around mooring mast Although Al Smith great vision docking blimps top building reality unrealistic bulders faced many obstacles work
user
Your evaluation score is: 4.0
assistant