[lemma=bilateral] [lemma=interview] [word=are] [□] □
[lemma=bilateral] [lemma=interview] [word=are] [□=□] □
[lemma=bilateral] [lemma=interview] [word=are] [!□] □
Bilateral interviews are essential because the interviewed can speak freely particularly if - as was the case - they are offered ironclad confidentiality protection .