Please answer the following question: I am trying to decide whether it's worth it to invest in this film proposal. Can you help me answer a few questions? If you can't, please say "No I can't". Question: How many children have to be in the circle? Movie title: Darkness Movie plot: Forty years after an unfinished occult ritual resulted in the disappearance of six young children, an American family has moved into a never-before inhabited house in Spain. The mother, Maria (Olin), wants to get the place in order, while the father, Mark (Glen), goes to work, and their children, teenager Regina (Paquin) and her younger brother Paul (Enquist), try to settle into their daily routines. It helps that Mark's doctor-father, Albert Rua (Giannini) has furnished them with their residence and is nearby, especially when Mark begins to suffer from seizures again due to the progression of his Huntington's disease, which also causes him to become increasingly mentally unstable. Regina is not only worried about him, but also Paul who is now scared of the dark for the first time. The young boy has reason for that, however, as there seems to be some sort of supernatural entity beneath his bed. Furthermore, there are instances when ghostly figures of children are seen standing in the shadow and darkness, watching the family. As Paul becomes more scared and their father continues to mentally deteriorate, Regina eventually figures out it must have something to do with their home where the power is lost every day. With the help of her new friend, Carlos (Martinez), the two eventually meet the man, Villalobos (Reixach), who designed the house, and learn that it was built for a supernatural ritual requiring the sacrifice of seven children (each sacrificed by "hands that love them") to coincide with an eclipse that only occurs every forty years. With the next one quickly approaching, and now armed with the knowledge that the earlier occult ritual needs one more death to be completed, Regina races to make sure that Paul is not the final victim. Stopping first at her grandfather Albert's house to warn him as well, Regina finds out that her grandfather is, in fact, a member of the cult which has been performing these satanic rituals. Her grandfather explains that in the ritual forty years ago, there actually were...
Answer:
Seven