Covid-19 twitter sentiment classification 1 Deep neural networks 1 Fuzzy inference 1 Health crisis 1 Mental health 1 Neuro-fuzzy approach 1 Population statistics 1 Semantics 1 Sentiment analysis 1 Sentiment classification 1 Social media datum 1 Social media platforms 1 Social networking (online) 1 Socio-economics 1 Sugeno integrals 1 Syntactics 1 Well being 1 deep fuzzy neural network sugeno integral 1