Possible children are not concatenated when forming updated semantic vector

[elisaF]

Equation (18) of the paper shows that children are also concatenated when forming the updated semantic vector.

However, the code at this line only concatenates p_i and e_i, as far as I can tell. What about the children? Am I missing something? https://github.com/nlpyang/structured/blob/015e9d496dda5d74dbca81118f20b9f4be5b53c9/models.py#L151

Thanks! Elisa