Semantic types for intervals are not properly added for the

INTERVAL_SEMANTIC_TYPES

If you run python3 -m d3m.container.dataset 31_urbansound_dataset/datasetDoc.json you can get all metadata for the dataset. It seems that the code for detecting the type of boundary columns is not working correctly and is not assigning https://metadata.datadrivendiscovery.org/types/Interval, https://metadata.datadrivendiscovery.org/types/IntervalStart, and https://metadata.datadrivendiscovery.org/types/IntervalEnd. But it should, because the dataset has those.