definiens: means ( a ) with respect to a Licensed Product in the United States or a Major European Country, if during a Calendar Quarter, one or more Biosimilar Product(s ) is commercially available in such country and such Biosimilar Product(s ) has a market share of [ * * ] percent [ * * ] % ) or more of the aggregate market in such country of such Licensed Product and the Biosi milar Product(s ) ( based on sales of units of such Licensed Product and such Biosimilar Product(s ), as reported by IMS International, or if such data are not available, such other reliable data source as reasonably determined by the Parties ) or ( b ) with res pect to a Licensed Product in any other country in the Territory, if during a Calendar Quarter, one or more Biosimilar Product(s ) is commercially available in such country and such Biosimilar Product(s ) reduces the Net Sales of such Licensed Product in suc h country by at least [ * * ] percent ( [ * * ] % ) as compared to the Net Sales in such country from the Calendar Quarter immediately preceding the commercial availability of such Biosimilar Product(s )