Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Private-equity firms completed 71 Japanese investments in the first half of this year, up from 60 in the same period the previous year, though the overall value nearly halved to $1.56 billion from $2.99 billion, according to S&P Capital IQ, a data and research provider.

Answer: product_or_material_produced: halved, half