“…In this context, data extraction consists in transforming tables into structured formats that focus on their data and abstract away from how they are displayed. Data extraction has many applications to text mining [24,64,65], data (meta-)search [3,9,18,26,44,51,[63][64][65], query expansion [16], document summarisation [40,64], question answering [1,20,44,46,65], knowledge discovery [9,22,26,32,44,46], knowledge base construction [17,72], knowledge augmentation [1,9,18,20,56,56,57,67], synonym finding [1,3,39], improving accessibility [43,47,49,64,65], textual advertising [15], data compression [2,49], or creating linked data…”