Complex sentence: PIE thematic nominals and thematic verbal stems all had fixed accent (i.e. on the same syllable throughout the paradigm), which was inherited in all attested daughter languages, although there exist some uncertainties regarding the simple thematic present.
Split into simpler sentences: PIE thematic nominals and thematic verbal stems all had fixed accent (i.e. on the same syllable throughout the paradigm), which was inherited in all attested daughter languages. Although, there exist some uncertainties regarding the simple thematic present.