Fixing crash when json.loads returns str

[jamesbraza]

Check this:

import json

assert isinstance(json.loads('"M. Thompson et al. (2021) studied mRNA-based COVID-19 vaccines in adults 50 years and older, finding high effectiveness against SARS-CoV-2 infection leading to severe outcomes. They indicated the need for completing vaccination for mRNA vaccines and noted potential effectiveness of the Ad26.COV2.S vaccine. Despite increased concern about SARS-CoV-2 variants during the study, most observations relate to the dominant B.1.1.7 (alpha) variant regionally. However, potential biases exist in vaccine effectiveness estimates due to possible misclassifications. The report\'s findings emphasize the importance of widespread vaccination to tackle COVID-19. Morbi blandit, nunc id pharetra volutpat. 8."'), dict)

The issue is that json.loads can return a string, which causes a crash when the downstream code assumes the return of json.loads is a dict. This PR fixes the issue