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:
Moreover, a sandbox is a temporary view of a document itself i.e. a sandbox can not cause a change in the history (Cunningham and Leuf, 2001). In wikis every document keeps track of its own history: creating a document means to start a history, editing a document to move ahead, restoring to move back onto the history timeline, destroying a document to stop the history itself. We consider it as a good approximation of the âversion controlâ concept as shown above.

Citation Sentence:
Moreover , a sandbox is a temporary view of a document itself i.e. a sandbox can not cause a change in the history ( Cunningham and Leuf , 2001 ) .

Context after the citation:
Figure 1 shows the model. History snapshots of the timeline may be considered as permanent views, i.e. views with a timestamp. Consequently, except in the case of sandboxes, every change in the document cannot be erased. This model will have a strong impact on the role of links and on the underpinning structure of Novelle itself. 
Background