I looked at your Ancestry tree online, and you seem to have quite a bit of information already on this couple.
I did find Frank and Elizabeth's death certs:
Frank FUKALLA died 2 Dec 1930, Benwood (not Brentwood), Ohio Co., WV "accidently killed when struck by an automoblie" He was a coal miner, but didn't list which coal mine he worked in. His age at his marriage in 1919 was 46 (born 1873, Austria), but his death cert said birthdate was 4 July 1878, Poland. You had a slightly different date on your online tree.
Elizabeth died 2 June 1942 in Marshall Co., of apoplexy & diabetes. Same thing with Elizabeth - her age was also 46 in 1919 (born 1873) but her death cert said her birthdate was 11 Sept 1869 - very different.
They are both buried at Mt. Calvary in Wheeling, Ohio Co., WV.
Hope this helps!