You will be presented with a citation segment from the section of an NLP research paper, as well as the context surrounding that citation. Classify the intent behind this citation by choosing from one of the following categories:
- Background: provides context or foundational information related to the topic.
- Extends: builds upon the cited work.
- Uses: applies the methods or findings of the cited work.
- Motivation: cites the work as inspiration or rationale for the research.
- CompareOrContrast: compares or contrasts the cited work with others.
- FutureWork: cites the work as a direction for future research.

Your answer should be a single word from the following list of options: ["Background", "Extends", "Uses", "Motivation", "CompareOrContrast", "FutureWork"]. Do not include any other text in your response.

Section Title:
introduction

Context before the citation:
OT therefore holds out the promise of simplifying grammars, by factoring all complex phenomena into simple surface-level constraints that partially mask one another.1 Whether this is always possible under an appropriate definition of &quot;simple constraints&quot; (e.g., Eisner 1997b) is of course an empirical question.  As Kager emphasizes, this interaction of violable constraints can yield complex surface patterns. Such a generalization may fail in contexts where it is overruled by a higher-ranked requirement of the language (or of the underlying form).

Citation Sentence:
OT therefore holds out the promise of simplifying grammars , by factoring all complex phenomena into simple surface-level constraints that partially mask one another .1 Whether this is always possible under an appropriate definition of `` simple constraints '' ( e.g. , Eisner 1997b ) is of course an empirical question .

Context after the citation:
Background