../nominus sss ddd fff

(1) iterating with .next_nominus():
    [sss]	[ddd]	[fff]	
(2) extracting nominus vector, then iterating:
    <sss>	<ddd>	<fff>	

../nominus -v sss -a ddd variable=12 fff

(1) iterating with .next_nominus():
    [sss]	[ddd]	[variable=12]	[fff]	
(2) extracting nominus vector, then iterating:
    <sss>	<ddd>	<variable=12>	<fff>	

