METU-VIREF is a video referring expression dataset comprising of videos from VIRAT Ground and ILSVRC2015 VID datasets. VIRAT is a surveillance dataset and contains mainly people and vehicles. To line up with this and restrict the domain, only videos that contain vehicles from the ILSVRC dataset are used. The METU-VIREF dataset does not contain whole videos from these datasets (the videos need to be downloaded from the respective sources) but just referring expressions for video sequences containing an object pair. For this, object pairs are chosen which had a relation that a meaningful referring expression could be written for.