def shell$egg$:
return egg["shell"]

def inner_membrane$egg$:
return egg["inner_membrane"]

def chalaza$egg$:
return egg["chalaza"]

def vitelline_membrane$egg$:
return egg["vitelline_membrane"]

def yolk$egg$:
return egg["yolk"]

def egg_white$egg$:
return egg["egg_white"]

def blastodisc$egg$:
return egg["blastodisc"]

def air_cell$egg$:
return egg["air_cell"]

def cuticle$egg$:
return egg["cuticle"]