Instigators are criminals who deliberately instigate others to commit a criminal intent. Their prominent feature is that they do not commit crimes themselves, but deliberately instigate others to have criminal intents and decide to commit crimes. According to the above definitions, which of the following is instigators? ['In a chat, Lin told Liu that he wanted to kill Ding. So Liu went to hire Ma to kill Ding.', 'Zheng was ill, and asked Lu to "ghost" him. Lu said nonsense that there was a problem in a certain graveyard. Zheng then nailed an iron rod to the grave under the guidance of Lu, and was pulled out by the grave owner. Later, Zheng was ill again, and suspected that the grave was acting strangely, so he decided to kill the grave owner and dispel the disaster for himself. So Zheng lied to the grave side and killed it with a kitchen knife.', "In the computer class, when talking about the school's computer security system, the teacher casually said to the students that the design is perfect, and if anyone can enter the security system, the manufacturer will have a bonus. As a result, a 15-year-old child really entered this Secure the system and force it down.", "Wang instructed his son (14 years old) and neighbor's child Doudou (15 years old) to steal wires and other power transmission equipment and then resell them. After being discovered, Wang completely ignored and continued to let his son and Doudou steal. Power lines, causing short circuits, causing power outages in multiple villages and putting transmission lines in a dangerous state."]