TextCases

TextCases[text,form] gives a list of all cases of text identified as being of type form that appear in text.

TextCases[text,{form1,form2,…}] gives an association of results for all the types formi. 

TextCases[text,formspec->prop] gives the specified property for each result found.

TextCases[text,formspec->{prop1,prop2,…}] gives a list of properties for each result found.

TextCases[text,spec,n] gives the first n cases found.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.