Sentence:  A survey with a sample size of 2,200 in five provinces, from the project Reexamining the Political Landscape of Thailand (Apichat et al., 2013) and conducted by Wanwiphand in April–June 2012, further confirmed Ammar's and Somchai's (2012) conclusions. Wanwiphand found that, firstly, Red Shirts were more likely to have lower socio-economic status than <WSD>Yellow Shirts</WSD>, and were also more likely to work in the agricultural or informal sectors. 
Meaning of the word marked with <WSD> tags:  A member of the Popular Alliance for Democracy (PAD), the organization responsible for the coup d'etat in Thailand in 2006.