Record-Setting Four Pound White Truffel Sold at Sotheby's

A record-setting 4-pound white truffle was auctioned at Sotheby's, with the winning bidder being a food and wine enthusiast from Taiwan. The truffle was discovered in Italy, surpassing the previous record of a 2.5-pound truffle.

What does Sotheby's describe the bitter as?

From which country must the truffle be sourced according to the text?

What was the weight of the record-setting white truffle mentioned in the text?

Where was the record fungus found?

What was the previous largest weight of a white truffle before the record was set?