title: Similarity measure using vectors in gensim
body: <p>I have a pair of word and semantic types of those words. I am trying to compute the relatedness measure between these two words using semantic types, for example: word1=king, type1=man, word2=queen, type2=woman
  we can use gensim word_vectors.most_similar to get 'queen' from 'king-man+woman'. However, I am looking for similarity measure between vector represented by 'king-man+woman' and 'queen'.</p>
  
  <p>I am looking for a solution to above (or)
  way to calculate vector that is representative of 'king-man+woman' (and)
  calculating similarity between two vectors using vector values in gensim (or)
   way to calculate simple mean of the projection weight vectors(i.e king-man+woman)</p>