Complex sentence: In literature, editor William Stanley Braithwaite's annual "Anthology of Magazine Verse" (1913-1929) was influential in its day; historian Daniel M. Scott III credits Braithwaite with making the poet Robert Frost famous.
Split into simpler sentences: In literature, editor William Stanley Braithwaite's annual "Anthology of Magazine Verse" (1913-1929) was influential in its day. Historian Daniel M. Scott III credits Braithwaite with making the poet Robert Frost famous.