Why not testing on referring expression comprehension tasks?

[waxnkw]

Thanks for the excellent work! I want to use the model on RefCOCO, RefCOCO+, RefCOCOg datasets. However, I noticed that the paper does not evaluate on referring expression comprehension tasks. Are there any concerns about evaluating the model on RefCOCO, RefCOCO+, RefCOCOg?