Some author details queries return an empty JSON

[mehdikhrichfa]

e.g: http://api.geranium.nexacenter.org/api?type=author&topic=Carbon&lines=10000&offset=0&url=http://geranium-project.org/authors/rp19756

[mehdikhrichfa]

Done.

[giuseppefutia]

I checked it and it does not seem work.