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
There many obstacles builders Empire State Building faced attempting allow dirigibles dock One example Most dirigibles outside United States used hydrogen rather helium hydrogen highly flammable The owners Empire State Building realized much worse accident could taken place densely populated area downtown New York When builders realized hydrogen flammable rethink construction fire would much dangerous populated area like New York The chances people getting hurt injured likely Another obstacle dirigibles could moor Empire State Building existing law airships flying low urban areas This law would make illegal shipped ever tie building even approach area This major obstacle builders would violating law It would also dangerous
user
Your evaluation score is: 4.0
assistant