组织 + Event/Activity
组织 (zǔzhī) as a verb means "to organize" or "to arrange." It can also function as a noun meaning "organization." For example, 欧洲核研究组织 refers to "the European Nuclear Research Organization."
谁来组织这次活动?
Shéi lái zǔzhī zhè cì huódòng?
Who will organize this event?
他负责组织公司的年会。
Tā fùzé zǔzhī gōngsī de niánhuì.
He is responsible for organizing the company's annual party.
我们需要组织一批志愿者去帮忙。
Wǒmen xūyào zǔzhī yī pī zhìyuànzhě qù bāngmáng.
We need to organize a group of volunteers to help.