// Ideally this wouldn't be necessary...
{ SP_UNKNOWN, { // Line 1: enum
    "??", // Line 2: abbrev
    "Yak", nullptr, nullptr, // Line 3: name, genus name, adjectival name
    SPF_NONE, // Line 4: flags
    0, 0, 0, 0, // Line 5: XP, HP, MP, WL (gen-apt.pl needs them here!)
    MONS_PROGRAM_BUG, // Line 6: equivalent monster type
    HT_LAND, US_ALIVE, SIZE_MEDIUM, // Line 7: habitat, life, size
    0, 0, 0, // Line 8: str, int, dex
    set<stat_type>(), 28, // Line 9: str gain, int gain, dex gain, frequency
    {}, // Line 10: Mutations
    {}, // Line 11: Fake mutations
    {}, // Line 12: Fake mutations
    {}, // Line 13: Recommended jobs
    {}, // Line 14: Recommended weapons
    nullptr, // Line 15: walk verb
    nullptr, // Line 16: pray verb
} }
};