Complex sentence: When Gina goes missing, Rosie and Sophie help Leah find her and Gina visits the street, wanting to talk to Sally but Leah bundles her into the car and drives off.
Split into simpler sentences: When Gina goes missing, Rosie and Sophie help Leah find he and Gina turns up on the street. Gina wants to talk to Sally, but Leah bundles her into the car and drives off.