Table 1:

Example Extraction Patterns for Relations Between Nodule Size and Anatomy Location

there be * <target> * mm * <nodule> in the <anatomy>

<anatomy> * <number> mm * previously <target>

<nodule> * in * the * <anatomy> * measure <number> x <target> mm

Particular types of tokens, such as numbers (<number>), nodule types, including tumor, lesion, nodule, and opacity (<nodule>), and anatomy phrases (<anatomy>), were replaced by generic symbols. Target phrases are represented by <target> and wildcards are represented by asterisks. Words have been normalized to their root forms.