悲(かな)し()い() kanashiiこと kotoに ni彼(かれ)の() kareno夢(ゆめ) yumeは wa実(じつ)現(げん) jitsugenしなかった shinakatta。 Sadly, his dream didn't come true. Literal Sad [to the fact that-ことに] his dream [topic-は] was-not-realized. 悲しいことに is a set sentence-opener meaning 'sadly, unfortunately.' 実現する means 'to come true, be realized.' dreamssadnessemotions悲しいことに (sadly)
悲(かな)し()い() kanashiiこと kotoに ni彼(かれ)の() kareno夢(ゆめ) yumeは wa実(じつ)現(げん) jitsugenしなかった shinakatta。 Sadly, his dream didn't come true. Literal Sad [to the fact that-ことに] his dream [topic-は] was-not-realized. 悲しいことに is a set sentence-opener meaning 'sadly, unfortunately.' 実現する means 'to come true, be realized.' dreamssadnessemotions悲しいことに (sadly)