index_ade20k['objectnames'] indexing mistake

Using `ObjectClassMasks = (R/10).astype(np.int32)*256+(G.astype(np.int32));` I got the id 165 for a particular pixel by which `index_ade20k['objectnames'][165]` gives 'bed column'. However according to the accompanying json to this image, the object name for 165 should be 'bed'. It seems that `index_ade20k['objectnames']` is one behind. `index_ade20k[164]` gives the correct name 'bed'.