You're unlikely to find anything specific to Word 2016, because what works in Word 2007, 2010 & 2013 all work the same in Word 2016. The following demos should help:
Dependent Dropdown Content Controls
https://www.msofficeforums.com/word-...html#post77762
Hierarchical Dropdown Content Controls
https://www.msofficeforums.com/word-...html#post94603
Dependent Text Content Controls
https://www.msofficeforums.com/word-...html#post46903
and, for different elements from a selected item to be output to different content controls, see:
https://www.msofficeforums.com/word-...tml#post120392