The phrase "a group that started" is correct and usable in written English.
It can be used to refer to a specific group that initiated an action or movement, often in a historical or organizational context.
Example: "The group that started the environmental movement in the 1970s has had a lasting impact on conservation efforts."
Alternatives: "a team that initiated" or "an organization that founded".
We re building on a group that started networking almost a year ago for the first March Against Myths About Modification in Portland.
Catherine led a group that started with reflecting on the case studies.
I have no such problem with ACME, a group that started about the same time.
Not bad for a group that started out with all volunteer musicians and still has a few in its ranks.
The Green Party of Switzerland is an example of a group that started small and, broadening its platform, succeeded in entering the mainstream.
And Disabled People Against Cuts – a group that started as just a handful of disabled people – persuading the United Nations to investigate the government's disability cuts.
But in percentage terms, the fastest employment gains will be for workers with master's degrees, a group that starts from a much smaller base.
Dan Levinson, founder of the Westport Green Village Initiative, a nonprofit group that started an organic garden at a local high school and provides financing for the farmers' market, attributes his organization's success to the community's new mind-set.
The American Management Association, a New York group that started a course in 1994 called "Effective Presentation Skills for Technical Professionals," held 11 sessions this year, compared with 3 in its first year.
"I think it's a victory for those who wanted to restore accountability and democracy to the nation's oldest listener-sponsored network," said Dan Coughlin, the coordinator of a listener group that started a boycott against the stations in February.
Years before the group made its regular home at the Segerstrom Center for the Arts, before it toured overseas and even performed in the Soviet Union, it was a fledgling group that started as an offshoot of a UCI Extension course and rehearsed mostly at local high schools.
