===Jacana word aligner===
Slides accompanying the article are located at [[http://cs.jhu.edu/~xuchen/paper/yao-jacana-wordalign-acl2013.ppt]]

**1/** Describe parameters of feature function in section 3.1. Is there something unclear in the formula?

**2/** Section 3.1 describes a problem with unknown number of states.
For example, we have the following source sentence: //"Linda is married to Charles."//
and target sentence: //"Charles likes his new role as the husband."//
and tags: NOUN, VERB, ADJ, ADV, PRON, DET, ADP, NUM, CONJ, PRT
How many states will be used?

**3/** Search WordNet (http://wordnetweb.princeton.edu/perl/webwn) for words "married" and "husband". Which (non-zero) WordNet features will be triggered for these two words?

**a/** using POS tagger
**b/** without POS tagger

**4/** Why do you think, the authors add Hamming distance (cost) into the first formula in Section 3.1. Can the normalization function Z work without it?