Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE building ( building_id text, name text, street_address text, years_as_tallest text, height_feet number, floors number )
TABLE: CREATE TABLE protein ( common_name text, protein_name text, divergence_from_human_lineage number, accession_number text, sequence_length number, sequence_identity_to_human_protein text, institution_id text )
TABLE: CREATE TABLE institution ( institution_id text, institution text, location text, founded number, type text, enrollment number, team text, primary_conference text, building_id text )

### Question ###
Show the institution type with an institution founded after 1990 and an institution with at least 1000 enrollment.

### Accurate SQL ###

SELECT type FROM institution WHERE founded > 1990 AND enrollment >= 1000