Let there be two relations 𝑋 and 𝑌 as shown. 𝑋 has three columns 𝑃, 𝑄 and…

Let there be two relations 𝑋 and 𝑌 as shown. 𝑋 has three columns 𝑃, 𝑄 and 𝑅. 𝑌 has two columns 𝑃 and 𝑆.

Consider that the following tuple relational calculus expression is evaluated.

{𝑡|𝑡 ∈ 𝑋 ⋀ ∃𝑧 ∈ 𝑋(𝑡[𝑃] = 𝑧[𝑃]) ⋀ ∃𝑚 ∈ 𝑌 (𝑚[𝑃] = 𝑡[𝑃] ⋀ 𝑚[𝑆] > 1)}

The number of tuples that will be returned is __________ . (Answer in integer)