# Sentence Tracker — Video Retrieval

A video search engine that supports sentential queries over 10 full-length Hollywood movies. Given a sentential query which conforms to a grammar it returns ranked clips which depict the query sentence using the techniques developed in

*CoRR*, September 2013.

##### Template for sentential queries

\[ \textit{The}\; \left\{\begin{array}{l} \textit{person}\\ \textit{horse} \end{array}\right\}\; \left\{\begin{array}{l} \textit{approached}\; \textit{the}\; \left\{\begin{array}{l} \textit{person}\\ \textit{horse} \end{array}\right\}\; \left\{\begin{array}{l} \epsilon\\ \textit{quickly}\\ \textit{slowly} \end{array}\right\}\; \left\{\begin{array}{l} \epsilon\\ \textit{from the left}\\ \textit{from the right} \end{array}\right\}\\ \left\{\begin{array}{l} \textit{lead}\\ \textit{rode} \end{array}\right\}\; \textit{the}\; \left\{\begin{array}{l} \textit{person}\\ \textit{horse} \end{array}\right\}\; \left\{\begin{array}{l} \epsilon\\ \textit{quickly}\\ \textit{slowly} \end{array}\right\}\; \left\{\begin{array}{l} \epsilon\\ \textit{leftward}\\ \textit{rightward}\\ \left\{\begin{array}{l} \textit{towards}\\ \textit{away from} \end{array}\right\}\; \textit{the}\; \left\{\begin{array}{l} \textit{person}\\ \textit{horse} \end{array}\right\} \end{array}\right\} \end{array}\right\} \]

##### The 10 Hollywood movies

##### Sample sentences

- The person rode the horse
- The person rode the horse quickly
- The person rode the horse slowly
- The person rode the horse leftward
- The person rode the horse rightward
- The person rode the horse quickly rightward
- The person rode the horse slowly rightward
- The person lead the horse
- The horse lead the person
- The horse approached the person
- The person approached the horse