Original sentence: Sigurdur Thorarinsson (Icelandic: Sigurður Þórarinsson) (January 8, 1912–February 8, 1983) was an Icelandic geologist, volcanologist, glaciologist, professor and lyricist
Edited sentence: Sigurdur Thorarinsson (properly spelled Sigurður Þórarinsson) (January 8, 1912–February 8, 1983) was an Icelandic geologist, volcanologist, glaciologist, professor and lyricist