Complex sentence: LW5/7 is a standing para-alpine and para-Nordic skiing classification for skiers with upper extremity issues in both limbs that may include double amputation of both arms and hands or dysmelia of the upper limbs.
Split into simpler sentences: LW5/7 is a standing para-alpine and para-Nordic skiing classification. The disability may be a result of double amputation of both arms and hands or dysmelia of the upper limbs.