Complex sentence: Miller doesn't keep track of how many troll dolls she collects, however, she stated on the Trachtenburg Family Slideshow Players' DVD, "On and Off Broadway", that she has an estimated collection of 500.
Split into simpler sentences: Miller doesn't keep track of how many troll dolls she collects. However, she stated on the Trachtenburg Family Slideshow Players' DVD, "On and Off Broadway", that she has an estimated collection of 500.