Given the task definition and input, reply with output. You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

The popliteal lymph nodes, small in size and some six or seven in number, are embedded in the fat contained in the popliteal fossa, sometimes referred to as the 'knee pit'. One lies immediately beneath the popliteal fascia, near the terminal part of the small saphenous vein, and drains the region from which this vein derives its tributaries, such as superficial regions of the posterolateral aspect of the leg and the plantar aspect of the foot.

is there a lymph node behind the knee?