This paper presents a comparison of two designs for implementing argument frame information on verbs. In the first design, alternating verbs will be represented with one lexical entry pr. possible argument frame. In the other design, each verb form will be associated with only one lexical entry containing a packed representation of the possible argument frames. The first design represents how v...

This paper deals with algorithms for producing and ordering lexical and nonlexical sequences of a given degree. The notion of ”elementary operations” on positive α-sequences is introduced. Our main theorem answers the question of when two lexical sequences are adjacent. Given any lexical sequence, α ∈ Ln, we can produce its adjacent successor as follows; apply one elementary operation on the ta...

In this paper we present a profile of verb usage across ages in child-produced sentences in English and Portuguese. We examine in particular lexical and syntactic characteristics of verbs and find common trends in these languages as children’s ages increase, such as the prominence of general and polysemic verbs, as well as divergences such as the proportion of subject dropping. We also find a c...

Any dictionary definition suggests that learning involves the acquisition of knowledge or behaviour. Chris Thornton, in a thought provoking essay suggests that learning tasks must be presented in the form of example association pairs (Thornton 2000). Consequently, he defines all learning tasks in terms of mapping. A learner agent can always read this mapping in two ways: as saying what actions ...

We propose and motivate a novel task: paragraph segmentation. We discuss and compare this task with text segmentation and discourse parsing. We present a system that performs the task with high accuracy. A variety of features is proposed and examined in detail. The best models turn out to include lexical, coherence, and structural features.

The lexical transfer phase is the most crucial step in MT because most of difficult problems are caused by lexical differences between two languages. In order to treat lexical issues systematically in transfer-based MT systems, we introduce the concept of bilingual-sings which are defined by pairs of equivalent monolingual signs. The bilingual signs not only relate the local linguistic structur...

This paper presents an investigation of score prediction for the Organization dimension of an assessment of analytical writing in response to text. With the long-term goal of producing feedback for students and teachers, we designed a task-dependent model that aligns with the scoring rubric and makes use of the source material. Our experimental results show that our rubric-based model performs ...