(In our experiments, we observed that 42% of the queries had at least one upper-case character.)
given a query Q = q 1 q 2 q 3 • • • q n , we define a candidate entity E = e 1 e 2 • • • e m as the maximal sequence of words (i.e., alpha-numeric characters) in the query such that each word e i in the entity begins with an uppercase character.