Go to notification list > edit notification > Design tab >click on  Text-editor  

Somewhere is fall back values for dynamic location keywords : {{city}}, {{state}},{{country}}

When we are not receiving location values from your data source or integration setting, we display  "somewhere". 

If you are seeing it instead of location value means your source/integration is not sending location value. 

You can change this text & write custom location like New York, USA.