Standardise and/or propagate title_abbrev_j

[cverluise]

Motivation

1. There is a 1:n relation between title_j and title_abbrev_j. E.g.

title_j	count_distinct	title_abbrev_j
Inflammation Research	3	Inflamm. res.,Inflamm. Res.,Inflamm Res
Biological Cybernetics	3	Biological Cybernetics,Biol. Cybern.,Biol. Cybernetics
Journal of Materials Science	3	J Mater Sci,JOURNAL OF MATERIALS SCIENCE,Journal of Materials Science

2. About half of the npl_publn with a title_j have no title_abbrev_j.

How to reproduce the behavior

1. See below

SELECT
  title_j,
  count(distinct(title_abbrev_j)) as count_distinct,
  STRING_AGG(distinct(title_abbrev_j)) as title_abbrev_j
FROM
  `npl-parsing.patcit.beta`
WHERE
  title_j is not null
GROUP BY 
  title_j 
ORDER BY
  count_distinct
  DESC

2. See below

SELECT
  count(distinct(npl_publn_id)) as count_distinct
FROM
  `npl-parsing.patcit.beta`
WHERE
  title_j is not null and title_abbrev_j is NULL # comment and title_abbrev_j is NULL for denom

Feature request

0. Decide whether we should keep the title_abbrev_j. Note that, at least in the beta, there is no npl_publn with null title_j but with non null title_abbrev_j. In a sense, title_abbrev_j does not add any specific/new information

1. Following 0., the priority seems to bee to standardise title_j. From that, we can populate the title_abbrev_j disregarding it parsed value.