Embedded Thoughts: Combining Sentences by Embedding Thoughts
Several separate sentences may combine into a more complex sentence when one clause keeps its independence and the others are embedded into it as dependent clauses.
Separate sentences:
Lobbyists are paid by many private and public organizations.
The organizations raise money from people.
The people want their opinions to be taken seriously on Capitol Hill.
Combined:
Lobbyists are paid by many private and public organizations {that raise money from people} {who want their opinions to be taken
seriously on Capitol Hill}.