(P19)	(Q1792) (P143) (P4656) https://de.wikipedia.org/w/index.php?title=Gustav_Ahrens&oldid=180362634
(P21)	(Q6581097)
(P31)	(Q5)
(P106)	(Q806798) (P143)
(P569)	Saturday, June 16, 1860 (P143)
(P570)	Sunday, May 24, 1914 (P143)
(P735)	(Q746076)

External Links

(P214)	30283568
(P227)	116272147
(P2671)	/g/11f61585mb
(P10832)	E39PBJkp9dC3hw9Cv6Ymmt3CwC