As the count-based vectors may overfit to the entity descriptions and to avoid discontinuity in the temporal signatures, we apply exponential smoothing and get smoothed temporal vectors 2 In an analysis of temporal expressions extracted with HeidelTime from the Wikipedia corpus (August 2016 dump), we find that there are on average 18.500 expressions per year value (with year values ranging from 0001 AD to 2050 AD) in contrast to only 9.64 expressions per day value (with day values ranging from 0001-01-01 to 2050-12-31).
using year level identifiers to define our temporal vector space results in short and non-sparse temporal vectors.