Semantic relations are often signaled with prepositional or possessive
marking--but extreme polysemy bedevils their analysis and automatic
interpretation. We introduce a new annotation scheme, corpus, and task for the
disambiguation of prepositions and possessives in English. Unlike previous
approaches, our annotations are comprehensive with respect to types and tokens
of these markers; use broadly applicable supersense classes rather than
fine-grained dictionary definitions; unite prepositions and possessives under
the same class inventory; and distinguish between a marker's lexical
contribution and the role it marks in the context of a predicate or scene.
Strong interannotator agreement rates, as well as encouraging disambiguation
results with established supervised methods, speak to the viability of the
scheme and task.

为了解决语义关系的歧义和语料中多义词的问题，我们引入了一种新的英语介词和所有格标记消歧的注释方案，并采用了广泛适用的 “超感分类” 而非细粒度字典定义方式来对介词和所有格进行注释，并结合谓词或场景上下文中标记的词汇贡献和角色，用相同的类别描述了介词和所有格。强的互评一致性和鼓励的解消歧方法的结果说明了该方案和任务的可行性。