58913
The sentence in question: その理由を聞いてみると。

For full context:
<https://www3.nhk.or.jp/news/web_tokushu/2018_0521.html?utm_int=news_contents_tokushu_004>

My attempt at translatino: "I tried to learn of the reasons."

The sentence itself seems fairly simple to me, however I have no clue what to
do with this "trailing" と ^^
CC BY-SA 4.0
2018-05-23T09:23:22.170
58911
2018-05-23T09:29:25.280
20172
question
grammar particle-と
What does this と at the end of the sentence do?
This と simply means "when". It's explained
[here](https://japanese.stackexchange.com/a/1784/5010). This is an
"incomplete" sentence which is used to draw attention to the following part of
the article. You can read this as if there were an ellipsis at the end of the
sentence.

> その理由を聞いてみると。  
>  When we (the clue) asked the reason ...  
>  We asked the reason, and ...
CC BY-SA 4.0
2018-05-23T09:29:25.280
58913
2018-05-23T09:29:25.280
5010
58911
answer