Step 1: Select rows where 'family' is 'unassigned'.
| family | 
baltimore_group | 
envelopment | 
virion_shape | 
replication_site | 
| adenoviridae | 
group i | 
non - enveloped | 
icosahedral | 
nucleus | 
| herpesviridae | 
group i | 
enveloped | 
complex | 
nucleus | 
| papillomaviridae | 
group i | 
non - enveloped | 
icosahedral | 
nucleus | 
| polyomaviridae | 
group i | 
non - enveloped | 
icosahedral | 
nucleus | 
| poxviridae | 
group i | 
enveloped | 
complex | 
cytoplasm | 
| hepadnaviridae | 
group vii | 
enveloped | 
icosahedral | 
nucleus | 
| parvoviridae | 
group ii | 
non - enveloped | 
icosahedral | 
nucleus | 
| astroviridae | 
group iv | 
non - enveloped | 
icosahedral | 
cytoplasm | 
| caliciviridae | 
group iv | 
non - enveloped | 
icosahedral | 
cytoplasm | 
| picornaviridae | 
group iv | 
non - enveloped | 
icosahedral | 
cytoplasm | 
| coronaviridae | 
group iv | 
enveloped | 
helical | 
cytoplasm | 
| flaviviridae | 
group iv | 
enveloped | 
icosahedral | 
cytoplasm | 
| togaviridae | 
group iv | 
enveloped | 
icosahedral | 
cytoplasm | 
| hepeviridae | 
group iv | 
enveloped | 
icosahedral | 
cytoplasm | 
| retroviridae | 
group vi | 
enveloped | 
icosahedral | 
nucleus | 
| orthomyxoviridae | 
group v | 
enveloped | 
helical | 
nucleus | 
| arenaviridae | 
group v | 
enveloped | 
helical | 
cytoplasm | 
| bunyaviridae | 
group v | 
enveloped | 
helical | 
cytoplasm | 
| filoviridae | 
group v | 
enveloped | 
helical | 
cytoplasm | 
| paramyxoviridae | 
group v | 
enveloped | 
helical | 
cytoplasm | 
| rhabdoviridae | 
group v | 
enveloped | 
helical , bullet shaped | 
cytoplasm | 
| unassigned | 
group v | 
enveloped | 
spherical | 
nucleus | 
| reoviridae | 
group iii | 
non - enveloped | 
icosahedral | 
cytoplasm | 
 
Step 2: Use a `CASE` statement to return TRUE if the number of rows is equal to 1, otherwise return FALSE.
| family | 
baltimore_group | 
envelopment | 
virion_shape | 
replication_site | 
| unassigned | 
group v | 
enveloped | 
spherical | 
nucleus | 
 
 
Prediction: TRUE 
Ground-truth: FALSE