8.9.3 Can you answer these questions?

8.9.3.1 How to prevent output of Entity object in EntityValue?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=265209

By default, no matter 
 ElementData["Hydrogen", "DiscoveryCountries"] 
 
or 
... 
[entity]
 

asked by matheorem https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4742 Score of 1

8.9.3.2 Rectangular Image Segmentation?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=265260

I'd like to segment an image such that the components are rectangles. Is this possible out of the box?  For example: 
... 
[image-processing] [image] [segmentation] [rectangle] [morphologicalcomponents]
 

asked by M.R. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=403 Score of 1

8.9.3.3 How to predict the future by machine learning past data?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=265137

The following is 1,094 days (Length@btcData) of Bitcoin prices. Among them, data for the first 985 days (Length@btctrain) were used for training, and data for the last 109 days (Length@btctest) were ... 
[machine] [netchain] [predict]
 

asked by Hoony https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=21427 Score of 1

answered by Domen https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75628 Score of 0