PPE

hello Chris Thank you for the lectures however while I was solving question from Kaplan exam kit, I came across this question Smithson Co purchased a new building with a 50-year life for $10 million on 1 January 20X3. On 30 June 20X5, Smithson Co moved out of the building and rented it out to third parties on a short-term lease. Smithson Co uses the fair value model for investment properties. At 30 June 20X5 the fair value of the property was $11 million and at 31 December 20X5 it was $11.5 million. The question I have is.... While I used 2yrs 6mnths (1 Jan 20x3 - 30 June 20x5) for my depreciation (accumulated depreciation )..... They just used 6 months for their depreciation. Why did they use just 6 months. Thank you