Hans Kelsen's legal philosophy and legal theory is regarded by many in the field as the most influential theory in this century. This volume makes available some of the best work extant on Kelsens' theory, including papers newly translated into English. It covers topics such as competing philosophical positons on the nature of law, legal validity, legal powers, and the unity of municipal and international law, as well as shedding light on Kelsen's intellectual milieu and his intellectual debts.

We present a system for deciding whether a given sentence can be inferred from text. Each sentence is represented as a directed graph (extracted from a dependency parser) in which the nodes represent words or phrases, and the links represent syntactic and semantic relationships. We develop a learned graph matching model to approximate entailment by the amount of the sentence’s semantic content which is contained in the text. We present results on the Recognizing Textual Entailment dataset (Dagan et al., 2005), (...) and show that our approach outperforms Bag- Of-Words and TF-IDF models. (shrink)