Sentence:  If the <WSD>afternoon</WSD> was fine they strolled together in the park, very slowly, and with pauses to draw breath wherever the ground sloped upward. The slightest effort made the patient cough. He would stand leaning on a stick and holding a hand to his side, and when the paroxysm had passed it left him shaking. 
Meaning of the word marked with <WSD> tags:  The part of the day from noon or lunchtime until sunset, evening, or suppertime or 6pm.