The Oxford Advanced Learner's Dictionary gives, for the word witness, an example sentence as follows:

(Original Version)

Authentic Italian cooking is very healthy —— witness the low incidence of heart disease in Italy.

To me, the sentence should be rephrased as follows:

(My Version)

Authentic Italian cooking is very healthy —— as witnessed by the low incidence of heart disease in Italy.

So, I have several questions:

• What is the subject of witness in the sentence?

• Why isn't witness in the third-person singular form?

• Can we take it as an imperative sentence?

The Oxford Advanced Learner's Dictionary gives, for the word witness, an example sentence as follows:

(Original Version)

Authentic Italian cooking is very healthy —— witness the low incidence of heart disease in Italy.

To me, the sentence should be rephrased as follows:

(My Version)

Authentic Italian cooking is very healthy —— as witnessed by the low incidence of heart disease in Italy.

So, I have several questions:

• What is the subject of witness in the sentence?

• Why isn't witness in the third-person singular form?

• Can we take it as an imperative sentence?

The Oxford Advanced Learner's Dictionary gives, for the word witness, an example sentence as follows:

(Original Version)

Authentic Italian cooking is very healthy —— witness the low incidence of heart disease in Italy.

To me, the sentence should be rephrased as follows:

(My Version)

Authentic Italian cooking is very healthy —— as witnessed by the low incidence of heart disease in Italy.

So, I have two questions:

• What is the subject of witness in the sentence?

• Why isn't witness in the third-person singular form?

The Oxford Advanced Learner's Dictionary gives, for the word witness, an example sentence as follows:

(Original Version)

Authentic Italian cooking is very healthy —— witness the low incidence of heart disease in Italy.

To me, the sentence should be rephrased as follows:

(My Version)

Authentic Italian cooking is very healthy —— as witnessed by the low incidence of heart disease in Italy.

So, I have several questions:

• What is the subject of witness in the sentence?

• Why isn't witness in the third-person singular form?

• Can we take it as an imperative sentence?