Before revision:  The DAISY system utilizes machine learning techniques like video synchronization and gunshot temporal localization URLanize the unstructured social media videos and quickly localize gunshot in the videos.
After revision:  The DAISY system utilizes machine learning techniques and straightforward physics models. This tool relies on other tools we have already developed including video synchronization and gunshot temporal localization URLanize the unstructured social media videos and quickly localize gunshot in the videos.