\section{Problem Statement}

The hereby \textbf{Report 5} will state an essay for literature knowledge that might support our research. We evaluate several research work. This report will focus on the topic towards (i) \textbf{Gamification \& Crowdsourcing} application on \textit{Health Informatics}; (ii) \textbf{Gathering Annotated Data}; and (iii) \textbf{Interactive Learning}. All topics are of chief importance to our research work, therefore should be analysed.