In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

This evidence , combined with the small size of other primitive relatives such as " Microraptor " and the troodontid " Anchiornis " , indicates that the common ancestor of dromaeosaurids , troodontids , and birds ( which is called the ancestral paravian ) may have been very small , at around 65 cm in length and 600 to 700 grams of mass .
This evidence , and " Microraptor " and the troodontid " Anchiornis " , suggests the common ancestor of dromaeosaurs , troodontids , and birds – the ' ancestral paravian ' – may have been very small , at around 65 cm in length and 600 to 700 grams of mass .