Here's a short story:

The NCBI houses a series of databases relevant to biotechnology and biomedicine and is an important resource for bioinformatics tools and services. Major databases include GenBank for DNA sequences and PubMed, a bibliographic database for the biomedical literature. Other databases include the NCBI Epigenomics database. All these databases are available online through the Entrez search engine. 

NCBI was directed by David Lipman, one of the original authors of the BLAST sequence alignment program and a widely respected figure in bioinformatics. He also leads an intramural research program, including groups led by Stephen Altschul (another BLAST co-author), David Landsman, Eugene Koonin (a prolific author on comparative genomics), John Wilbur, Teresa Przytycka, and Zhiyong Lu. David Lipman stood down from his post in May 2017. 

NCBI is listed in the Registry of Research Data Repositories re3data.org. 

NCBI has had responsibility for making available the GenBank DNA sequence database since 1992. GenBank coordinates with individual laboratories and other sequence databases such as those of the European Molecular Biology Laboratory (EMBL) and the DNA Data Bank of Japan (DDBJ). 

Since 1992, NCBI has grown to provide other databases in addition to GenBank. NCBI provides Gene, Online Mendelian Inheritance in Man, the Molecular Modeling Database (3D protein structures), dbSNP (a database of single-nucleotide polymorphisms), the Reference Sequence Collection, a map of the human genome, and a taxonomy browser, and coordinates with the National Cancer Institute to provide the Cancer Genome Anatomy Project. The NCBI assigns a unique identifier (taxonomy ID number) to each species of organism. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: Who was the director of NCBI?
Guess: David Lipman

Question: What did he write?
Guess: BLAST sequence alignment program

Question: He he a respected person?
Guess: Yes

Question: In what?
Guess: bioinformatics

Question: Who helped write BLAST?
Guess: Stephen Altschul

Question: What kind of program does David run?
Guess: sequence alignment program

Question: What does Eugene Koonin write about?
Guess: comparative genomics

Question: How many groups are in the intramural research program?
Guess: Six

Question: Is John Wilbur a leader of one?
Guess: Yes

Question: When did Lipman quit?
Guess: May 2017

Now answer the following question in the same format.

Question: What does the NCBI do?

making available the GenBank DNA sequence database