1973 Gabonese general election
President
Table:
Candidate

Party

Votes

%

Omar Bongo
Gabonese Democratic Party
515,841
100

Invalid/blank votes
2,091
–

Total
517,932
100

Registered voters/turnout
529,828
97.8

Source: Nohlen et al.

Observing the data table for '1973 Gabonese general election', section 'President', create one factual sentence about the highlighted cells, without adding extra data and return it as JSON: {"answer": "YOUR ANSWER"}.