Complex sentence: In Pessoa's case, there are at least 70 heteronyms (according to the latest count by Pessoa's editor Teresa Rita Lopes); some of them are relatives or know each other; they criticise and translate each other's works.
Split into simpler sentences: In Pessoa's case, there are at least 70 heteronyms (according to the latest count by Pessoa's editor Teresa Rita Lopes). Some of them are relatives or know each other; they criticise and translate each other's works.