Table 1. Features of the model and their entry sets.

Feature	Categories
Brows move	{Up, Down}
Blinks	{Blink}
Mouth	{Open, Closed}
Mouth shape	{Round, Flat, Other}
Teeth	{Closed, Open, Touch lip}
Head turns	{Left, Right}
Head tilts	{Left, Right}
Head moves	{Up, Down}